diff --git a/server/internal/app/app.go b/server/internal/app/app.go
index 99ddee3..bb3174d 100644
--- a/server/internal/app/app.go
+++ b/server/internal/app/app.go
@@ -73,6 +73,8 @@ func New(ctx context.Context, cfg config.Config, version string) (*Application,
 		storageRclone.NewFTPFactory(),
 		storageRclone.NewRcloneFactory(),
 	)
+	// 将全部 rclone 后端注册为独立存储类型（sftp、azureblob、dropbox 等与 s3、ftp 完全平级）
+	storageRclone.RegisterAllBackends(storageRegistry)
 	storageTargetService := service.NewStorageTargetService(storageTargetRepo, oauthSessionRepo, storageRegistry, configCipher)
 	storageTargetService.SetBackupTaskRepository(backupTaskRepo)
 	storageTargetService.SetBackupRecordRepository(backupRecordRepo)
diff --git a/server/internal/service/storage_target_service.go b/server/internal/service/storage_target_service.go
index 2e9ec4c..0896e79 100644
--- a/server/internal/service/storage_target_service.go
+++ b/server/internal/service/storage_target_service.go
@@ -21,7 +21,7 @@ import (
 
 type StorageTargetUpsertInput struct {
 	Name        string         `json:"name" binding:"required,min=1,max=128"`
-	Type        string         `json:"type" binding:"required,oneof=local_disk google_drive s3 webdav aliyun_oss tencent_cos qiniu_kodo ftp rclone"`
+	Type        string         `json:"type" binding:"required,min=1"`
 	Description string         `json:"description" binding:"max=255"`
 	Enabled     bool           `json:"enabled"`
 	Config      map[string]any `json:"config" binding:"required"`
diff --git a/server/internal/storage/rclone/factory.go b/server/internal/storage/rclone/factory.go
index 358e38d..bf342df 100644
--- a/server/internal/storage/rclone/factory.go
+++ b/server/internal/storage/rclone/factory.go
@@ -434,3 +434,75 @@ type BackendOption struct {
 	Required   bool   `json:"required"`
 	IsPassword bool   `json:"isPassword"`
 }
+
+// ---------------------------------------------------------------------------
+// 通用 BackendFactory — 为任意 rclone 后端自动生成独立 Factory
+// ---------------------------------------------------------------------------
+
+// GenericBackendFactory 为单个 rclone 后端创建独立的 ProviderFactory。
+// 用户存储目标的 type 直接是后端名（如 "sftp"），与 "s3"、"ftp" 完全平级。
+type GenericBackendFactory struct {
+	backendType string
+	sensitive   []string
+}
+
+// NewBackendFactory 为指定 rclone 后端创建一个 Factory。
+func NewBackendFactory(backendType string) GenericBackendFactory {
+	var sensitive []string
+	for _, ri := range fs.Registry {
+		if ri.Name == backendType {
+			for _, opt := range ri.Options {
+				if opt.IsPassword {
+					sensitive = append(sensitive, opt.Name)
+				}
+			}
+			break
+		}
+	}
+	return GenericBackendFactory{backendType: backendType, sensitive: sensitive}
+}
+
+func (f GenericBackendFactory) Type() storage.ProviderType { return storage.ProviderType(f.backendType) }
+func (f GenericBackendFactory) SensitiveFields() []string   { return f.sensitive }
+
+func (f GenericBackendFactory) New(ctx context.Context, rawConfig map[string]any) (storage.StorageProvider, error) {
+	root, _ := rawConfig["root"].(string)
+	root = strings.TrimSpace(root)
+
+	var b strings.Builder
+	b.WriteString(":")
+	b.WriteString(f.backendType)
+	for key, val := range rawConfig {
+		if key == "root" {
+			continue
+		}
+		strVal := fmt.Sprintf("%v", val)
+		if strings.TrimSpace(strVal) == "" {
+			continue
+		}
+		b.WriteString(",")
+		b.WriteString(key)
+		b.WriteString("=")
+		b.WriteString(quoteParam(strVal))
+	}
+	b.WriteString(":")
+	b.WriteString(root)
+
+	return newFs(ctx, storage.ProviderType(f.backendType), b.String())
+}
+
+// RegisterAllBackends 将所有 rclone 后端注册为独立 Factory 到 Registry。
+// 已存在的内置类型（s3, ftp 等）不会被覆盖。
+func RegisterAllBackends(registry *storage.Registry) {
+	builtinTypes := map[string]bool{
+		"local_disk": true, "s3": true, "webdav": true, "google_drive": true,
+		"ftp": true, "aliyun_oss": true, "tencent_cos": true, "qiniu_kodo": true,
+		"rclone": true, "local": true,
+	}
+	for _, info := range ListBackends() {
+		if builtinTypes[info.Name] {
+			continue
+		}
+		registry.Register(NewBackendFactory(info.Name))
+	}
+}
diff --git a/web/src/components/storage-targets/StorageTargetFormDrawer.tsx b/web/src/components/storage-targets/StorageTargetFormDrawer.tsx
index f7b1e8c..9fb65ad 100644
--- a/web/src/components/storage-targets/StorageTargetFormDrawer.tsx
+++ b/web/src/components/storage-targets/StorageTargetFormDrawer.tsx
@@ -1,6 +1,6 @@
 import { Alert, Button, Divider, Drawer, Input, Select, Space, Switch, Typography } from '@arco-design/web-react'
 import { useEffect, useMemo, useState } from 'react'
-import { getStorageTargetFieldConfigs, getStorageTargetTypeLabel, storageTargetTypeOptions } from './field-config'
+import { getStorageTargetFieldConfigs, getStorageTargetTypeLabel, isBuiltinType, builtinTypeOptions } from './field-config'
 import type { StorageConnectionTestResult, StorageTargetDetail, StorageTargetPayload, StorageTargetType } from '../../types/storage-targets'
 import { listRcloneBackends, type RcloneBackendInfo } from '../../services/rclone'
 
@@ -16,37 +16,29 @@ interface StorageTargetFormDrawerProps {
 }
 
 function createEmptyDraft(type: StorageTargetType = 'local_disk'): StorageTargetPayload {
-  return {
-    name: '',
-    type,
-    description: '',
-    enabled: true,
-    config: {},
-  }
+  return { name: '', type, description: '', enabled: true, config: {} }
 }
 
 export function StorageTargetFormDrawer({
-  visible,
-  loading,
-  testing,
-  initialValue,
-  onCancel,
-  onSubmit,
-  onTest,
-  onGoogleDriveAuth,
+  visible, loading, testing, initialValue, onCancel, onSubmit, onTest, onGoogleDriveAuth,
 }: StorageTargetFormDrawerProps) {
   const [draft, setDraft] = useState<StorageTargetPayload>(createEmptyDraft())
   const [error, setError] = useState('')
   const [testResult, setTestResult] = useState<StorageConnectionTestResult | null>(null)
-
-  // rclone 后端列表（API 驱动）
   const [rcloneBackends, setRcloneBackends] = useState<RcloneBackendInfo[]>([])
-  const [rcloneBackendsLoading, setRcloneBackendsLoading] = useState(false)
+  const [backendsLoaded, setBackendsLoaded] = useState(false)
 
+  // 加载 rclone 后端列表
   useEffect(() => {
-    if (!visible) {
-      return
+    if (visible && !backendsLoaded) {
+      listRcloneBackends()
+        .then((data) => { setRcloneBackends(data); setBackendsLoaded(true) })
+        .catch(() => setBackendsLoaded(true))
     }
+  }, [visible, backendsLoaded])
+
+  useEffect(() => {
+    if (!visible) return
     if (!initialValue) {
       setDraft(createEmptyDraft())
       setError('')
@@ -64,256 +56,137 @@ export function StorageTargetFormDrawer({
     setTestResult(null)
   }, [initialValue, visible])
 
-  // 当类型切换到 rclone 时，加载后端列表
-  useEffect(() => {
-    if (draft.type === 'rclone' && rcloneBackends.length === 0 && !rcloneBackendsLoading) {
-      setRcloneBackendsLoading(true)
-      listRcloneBackends()
-        .then(setRcloneBackends)
-        .catch(() => {})
-        .finally(() => setRcloneBackendsLoading(false))
-    }
-  }, [draft.type, rcloneBackends.length, rcloneBackendsLoading])
-
-  const fieldConfigs = useMemo(() => getStorageTargetFieldConfigs(draft.type), [draft.type])
+  // 合并类型选项：内置 + 全部 rclone 后端
+  const allTypeOptions = useMemo(() => {
+    const builtinValues = new Set(builtinTypeOptions.map((o) => o.value))
+    const rcloneOptions = rcloneBackends
+      .filter((b) => !builtinValues.has(b.name) && b.name !== 'local' && b.name !== 'rclone')
+      .map((b) => ({ label: `${b.name.toUpperCase()} — ${b.description}`, value: b.name }))
+    return [
+      ...builtinTypeOptions.map((o) => ({ ...o, label: o.label, value: o.value as string })),
+      ...rcloneOptions,
+    ]
+  }, [rcloneBackends])
 
-  // 当前选中的 rclone 后端信息
-  const selectedRcloneBackend = useMemo(() => {
-    if (draft.type !== 'rclone') return null
-    const backendName = draft.config.backend as string
-    if (!backendName) return null
-    return rcloneBackends.find((b) => b.name === backendName) || null
-  }, [draft.type, draft.config.backend, rcloneBackends])
+  // 当前类型是否为非内置（rclone 动态后端）
+  const isDynamicType = !isBuiltinType(draft.type)
+  const staticFields = isBuiltinType(draft.type) ? getStorageTargetFieldConfigs(draft.type) : []
 
-  // rclone 后端下拉选项
-  const rcloneBackendOptions = useMemo(() => {
-    return rcloneBackends.map((b) => ({
-      label: `${b.name} — ${b.description}`,
-      value: b.name,
-    }))
-  }, [rcloneBackends])
+  // 当前 rclone 后端的动态字段
+  const dynamicBackend = useMemo(() => {
+    if (!isDynamicType) return null
+    return rcloneBackends.find((b) => b.name === draft.type) || null
+  }, [isDynamicType, draft.type, rcloneBackends])
 
   function updateConfig(key: string, value: string | boolean) {
-    setDraft((current) => ({
-      ...current,
-      config: {
-        ...current.config,
-        [key]: value,
-      },
-    }))
+    setDraft((c) => ({ ...c, config: { ...c.config, [key]: value } }))
   }
 
   function validate(value: StorageTargetPayload) {
-    if (!value.name.trim()) {
-      return '请输入存储目标名称'
-    }
-    // rclone 类型需要选择后端
-    if (value.type === 'rclone') {
-      if (!value.config.backend || !(value.config.backend as string).trim()) {
-        return '请选择 Rclone 后端类型'
-      }
-      return ''
-    }
-    for (const field of fieldConfigs) {
-      if (!field.required) {
-        continue
-      }
-      const currentValue = value.config[field.key]
-      if (field.type === 'switch') {
-        continue
-      }
-      if (typeof currentValue !== 'string' || !currentValue.trim()) {
-        return `请填写${field.label}`
+    if (!value.name.trim()) return '请输入存储目标名称'
+    if (!value.type.trim()) return '请选择存储类型'
+    if (isBuiltinType(value.type)) {
+      for (const field of staticFields) {
+        if (!field.required || field.type === 'switch') continue
+        const v = value.config[field.key]
+        if (typeof v !== 'string' || !v.trim()) return `请填写${field.label}`
       }
     }
     return ''
   }
 
   async function handleSubmit() {
-    const validationError = validate(draft)
-    if (validationError) {
-      setError(validationError)
-      return
-    }
-    setError('')
-    await onSubmit(draft, initialValue?.id)
+    const e = validate(draft); if (e) { setError(e); return }
+    setError(''); await onSubmit(draft, initialValue?.id)
   }
-
   async function handleTest() {
-    const validationError = validate(draft)
-    if (validationError) {
-      setError(validationError)
-      return
-    }
-    setError('')
-    const result = await onTest(draft, initialValue?.id)
-    setTestResult(result)
+    const e = validate(draft); if (e) { setError(e); return }
+    setError(''); setTestResult(await onTest(draft, initialValue?.id))
   }
-
   async function handleGoogleDriveAuth() {
-    const validationError = validate(draft)
-    if (validationError) {
-      setError(validationError)
-      return
-    }
-    setError('')
-    await onGoogleDriveAuth(draft, initialValue?.id)
-  }
-
-  // 渲染 rclone 类型的动态配置表单
-  function renderRcloneFields() {
-    return (
-      <>
-        <div>
-          <Typography.Text>Rclone 后端类型 *</Typography.Text>
-          <Select
-            showSearch
-            allowClear
-            placeholder="搜索并选择后端（如 sftp, azureblob, dropbox...）"
-            loading={rcloneBackendsLoading}
-            value={(draft.config.backend as string) || undefined}
-            options={rcloneBackendOptions}
-            filterOption={(inputValue, option) => {
-              const label = (option?.props?.children ?? option?.props?.label ?? '') as string
-              return label.toLowerCase().includes(inputValue.toLowerCase())
-            }}
-            onChange={(value) => {
-              // 切换后端时清空旧配置，保留 backend 和 root
-              const root = draft.config.root || ''
-              setDraft((current) => ({
-                ...current,
-                config: { backend: value || '', root },
-              }))
-            }}
-          />
-          <Typography.Paragraph type="secondary" style={{ marginBottom: 0, marginTop: 4 }}>
-            支持 SFTP、Azure Blob、Dropbox、OneDrive、B2、SMB 等 70+ 存储后端
-          </Typography.Paragraph>
-        </div>
-
-        <div>
-          <Typography.Text>远端路径</Typography.Text>
-          <Input
-            value={(draft.config.root as string) || ''}
-            placeholder="/backups 或 bucket-name"
-            onChange={(value) => updateConfig('root', value)}
-          />
-          <Typography.Paragraph type="secondary" style={{ marginBottom: 0, marginTop: 4 }}>
-            远端存储的根路径、桶名或挂载点，留空使用根目录
-          </Typography.Paragraph>
-        </div>
-
-        {selectedRcloneBackend && selectedRcloneBackend.options.length > 0 && (
-          <>
-            <Divider orientation="left" style={{ margin: '8px 0' }}>
-              {selectedRcloneBackend.name} 配置
-            </Divider>
-            {selectedRcloneBackend.options.map((opt) => (
-              <div key={opt.key}>
-                <Typography.Text>
-                  {opt.key}
-                  {opt.required ? ' *' : ''}
-                </Typography.Text>
-                {opt.isPassword ? (
-                  <Input.Password
-                    value={(draft.config[opt.key] as string) || ''}
-                    placeholder={opt.label}
-                    onChange={(value) => updateConfig(opt.key, value)}
-                  />
-                ) : (
-                  <Input
-                    value={(draft.config[opt.key] as string) || ''}
-                    placeholder={opt.label}
-                    onChange={(value) => updateConfig(opt.key, value)}
-                  />
-                )}
-                {opt.label && (
-                  <Typography.Paragraph
-                    type="secondary"
-                    style={{ marginBottom: 0, marginTop: 2, fontSize: 12, lineHeight: '18px' }}
-                    ellipsis={{ rows: 2, expandable: true }}
-                  >
-                    {opt.label}
-                  </Typography.Paragraph>
-                )}
-              </div>
-            ))}
-          </>
-        )}
-      </>
-    )
+    const e = validate(draft); if (e) { setError(e); return }
+    setError(''); await onGoogleDriveAuth(draft, initialValue?.id)
   }
 
-  // 渲染常规类型的静态字段
+  // 渲染静态字段（内置类型）
   function renderStaticFields() {
-    return fieldConfigs.map((field) => {
+    return staticFields.map((field) => {
       const value = draft.config[field.key]
-      const normalizedValue = typeof value === 'boolean' ? value : typeof value === 'string' ? value : field.type === 'switch' ? false : ''
-
+      const normalized = typeof value === 'boolean' ? value : typeof value === 'string' ? value : field.type === 'switch' ? false : ''
       return (
         <div key={field.key}>
-          <Typography.Text>
-            {field.label}
-            {field.required ? ' *' : ''}
-          </Typography.Text>
+          <Typography.Text>{field.label}{field.required ? ' *' : ''}</Typography.Text>
           {field.type === 'switch' ? (
             <Space align="center" size="medium">
-              <Switch checked={Boolean(normalizedValue)} onChange={(checked) => updateConfig(field.key, checked)} />
-              {field.description ? <Typography.Text type="secondary">{field.description}</Typography.Text> : null}
+              <Switch checked={Boolean(normalized)} onChange={(v) => updateConfig(field.key, v)} />
+              {field.description && <Typography.Text type="secondary">{field.description}</Typography.Text>}
             </Space>
           ) : field.type === 'password' ? (
-            <Input.Password
-              value={String(normalizedValue)}
-              placeholder={field.placeholder}
-              onChange={(nextValue) => updateConfig(field.key, nextValue)}
-            />
+            <Input.Password value={String(normalized)} placeholder={field.placeholder} onChange={(v) => updateConfig(field.key, v)} />
           ) : (
-            <Input value={String(normalizedValue)} placeholder={field.placeholder} onChange={(nextValue) => updateConfig(field.key, nextValue)} />
+            <Input value={String(normalized)} placeholder={field.placeholder} onChange={(v) => updateConfig(field.key, v)} />
+          )}
+          {field.description && field.type !== 'switch' && (
+            <Typography.Paragraph type="secondary" style={{ marginBottom: 0, marginTop: 4 }}>{field.description}</Typography.Paragraph>
+          )}
+          {initialValue?.maskedFields?.includes(field.key) && !draft.config[field.key] && (
+            <Typography.Paragraph type="secondary" style={{ marginBottom: 0, marginTop: 4 }}>已存在敏感配置，留空则保持不变。</Typography.Paragraph>
           )}
-          {field.description && field.type !== 'switch' ? (
-            <Typography.Paragraph type="secondary" style={{ marginBottom: 0, marginTop: 4 }}>
-              {field.description}
-            </Typography.Paragraph>
-          ) : null}
-          {initialValue?.maskedFields?.includes(field.key) && !draft.config[field.key] ? (
-            <Typography.Paragraph type="secondary" style={{ marginBottom: 0, marginTop: 4 }}>
-              已存在敏感配置，留空则保持不变。
-            </Typography.Paragraph>
-          ) : null}
         </div>
       )
     })
   }
 
+  // 渲染动态字段（rclone 后端）
+  function renderDynamicFields() {
+    return (
+      <>
+        <div>
+          <Typography.Text>远端路径</Typography.Text>
+          <Input value={(draft.config.root as string) || ''} placeholder="如 /backups 或 bucket 名" onChange={(v) => updateConfig('root', v)} />
+          <Typography.Paragraph type="secondary" style={{ marginBottom: 0, marginTop: 4 }}>远端根路径、桶名或挂载点，留空使用根目录</Typography.Paragraph>
+        </div>
+        {dynamicBackend && dynamicBackend.options.length > 0 && dynamicBackend.options.map((opt) => (
+          <div key={opt.key}>
+            <Typography.Text>{opt.key}{opt.required ? ' *' : ''}</Typography.Text>
+            {opt.isPassword ? (
+              <Input.Password value={(draft.config[opt.key] as string) || ''} placeholder={opt.label} onChange={(v) => updateConfig(opt.key, v)} />
+            ) : (
+              <Input value={(draft.config[opt.key] as string) || ''} placeholder={opt.label} onChange={(v) => updateConfig(opt.key, v)} />
+            )}
+            {opt.label && (
+              <Typography.Paragraph type="secondary" style={{ marginBottom: 0, marginTop: 2, fontSize: 12 }} ellipsis={{ rows: 2, expandable: true }}>{opt.label}</Typography.Paragraph>
+            )}
+          </div>
+        ))}
+      </>
+    )
+  }
+
   return (
-    <Drawer
-      width={560}
-      title={initialValue ? '编辑存储目标' : '新建存储目标'}
-      visible={visible}
-      onCancel={onCancel}
-      unmountOnExit={false}
-    >
+    <Drawer width={560} title={initialValue ? '编辑存储目标' : '新建存储目标'} visible={visible} onCancel={onCancel} unmountOnExit={false}>
       <Space direction="vertical" size="large" style={{ width: '100%' }}>
         {error ? <Alert type="error" content={error} /> : <Alert type="info" content="存储目标提供备份文件的最终去向，请确保服务端网络连通性并通过测试。" />}
-        {testResult ? <Alert type={testResult.success ? 'success' : 'warning'} content={testResult.message} /> : null}
+        {testResult && <Alert type={testResult.success ? 'success' : 'warning'} content={testResult.message} />}
 
         <div>
           <Typography.Text>名称</Typography.Text>
-          <Input value={draft.name} placeholder="例如：生产环境 MinIO" onChange={(value) => setDraft((current) => ({ ...current, name: value }))} />
+          <Input value={draft.name} placeholder="例如：生产环境 MinIO" onChange={(v) => setDraft((c) => ({ ...c, name: v }))} />
         </div>
 
         <div>
-          <Typography.Text>类型</Typography.Text>
+          <Typography.Text>存储类型</Typography.Text>
           <Select
-            value={draft.type}
-            options={storageTargetTypeOptions as unknown as { label: string; value: string }[]}
+            showSearch
+            value={draft.type || undefined}
+            placeholder="搜索存储类型（如 SFTP、Azure Blob、Dropbox...）"
+            options={allTypeOptions}
+            filterOption={(input, option) => {
+              const label = (option?.props?.children ?? option?.props?.label ?? '') as string
+              return label.toLowerCase().includes(input.toLowerCase())
+            }}
             onChange={(value) => {
-              const nextType = value as StorageTargetType
-              setDraft((current) => ({
-                ...current,
-                type: nextType,
-                config: {},
-              }))
+              setDraft((c) => ({ ...c, type: value as string, config: {} }))
               setTestResult(null)
             }}
           />
@@ -321,16 +194,12 @@ export function StorageTargetFormDrawer({
 
         <div>
           <Typography.Text>描述</Typography.Text>
-          <Input.TextArea
-            value={draft.description}
-            placeholder="可选描述，例如备份上传到 NAS 或 Google Drive"
-            onChange={(value) => setDraft((current) => ({ ...current, description: value }))}
-          />
+          <Input.TextArea value={draft.description} placeholder="可选描述" onChange={(v) => setDraft((c) => ({ ...c, description: v }))} />
         </div>
 
         <Space align="center" size="medium">
           <Typography.Text>启用</Typography.Text>
-          <Switch checked={draft.enabled} onChange={(checked) => setDraft((current) => ({ ...current, enabled: checked }))} />
+          <Switch checked={draft.enabled} onChange={(v) => setDraft((c) => ({ ...c, enabled: v }))} />
         </Space>
 
         <Divider orientation="left">环境配置</Divider>
@@ -340,22 +209,18 @@ export function StorageTargetFormDrawer({
             {getStorageTargetTypeLabel(draft.type)}
           </Typography.Title>
           <Space direction="vertical" size="large" style={{ width: '100%' }}>
-            {draft.type === 'rclone' ? renderRcloneFields() : renderStaticFields()}
+            {isDynamicType ? renderDynamicFields() : renderStaticFields()}
           </Space>
         </div>
 
         <Space>
-          <Button loading={testing} onClick={handleTest}>
-            测试连接
-          </Button>
-          {draft.type === 'google_drive' ? (
+          <Button loading={testing} onClick={handleTest}>测试连接</Button>
+          {draft.type === 'google_drive' && (
             <Button type="outline" onClick={handleGoogleDriveAuth}>
               {initialValue ? '重新授权 Google Drive' : '发起 Google Drive 授权'}
             </Button>
-          ) : null}
-          <Button type="primary" loading={loading} onClick={handleSubmit}>
-            保存
-          </Button>
+          )}
+          <Button type="primary" loading={loading} onClick={handleSubmit}>保存</Button>
         </Space>
       </Space>
     </Drawer>
diff --git a/web/src/components/storage-targets/field-config.ts b/web/src/components/storage-targets/field-config.ts
index 54c0e72..f9d6ef5 100644
--- a/web/src/components/storage-targets/field-config.ts
+++ b/web/src/components/storage-targets/field-config.ts
@@ -1,298 +1,82 @@
 import type { StorageTargetFieldConfig, StorageTargetType } from '../../types/storage-targets'
 
-const FIELD_CONFIG_MAP: Record<StorageTargetType, StorageTargetFieldConfig[]> = {
+// 内置类型的静态字段配置（定制化配置结构）
+const BUILTIN_FIELD_CONFIG: Record<string, StorageTargetFieldConfig[]> = {
   local_disk: [
-    {
-      key: 'basePath',
-      label: '基础目录',
-      type: 'input',
-      required: true,
-      placeholder: '/data/backups',
-      description: 'BackupX 将在该目录下创建和管理备份文件。',
-    },
+    { key: 'basePath', label: '基础目录', type: 'input', required: true, placeholder: '/data/backups', description: 'BackupX 将在该目录下创建和管理备份文件。' },
   ],
   s3: [
-    {
-      key: 'endpoint',
-      label: 'Endpoint',
-      type: 'input',
-      required: true,
-      placeholder: 'https://s3.amazonaws.com',
-    },
-    {
-      key: 'region',
-      label: '区域',
-      type: 'input',
-      required: true,
-      placeholder: 'ap-east-1',
-    },
-    {
-      key: 'bucket',
-      label: 'Bucket',
-      type: 'input',
-      required: true,
-      placeholder: 'backupx-prod',
-    },
-    {
-      key: 'accessKeyId',
-      label: 'Access Key ID',
-      type: 'input',
-      required: true,
-      sensitive: true,
-      placeholder: 'AKIA...',
-    },
-    {
-      key: 'secretAccessKey',
-      label: 'Secret Access Key',
-      type: 'password',
-      required: true,
-      sensitive: true,
-      placeholder: '输入新的 Secret Access Key',
-    },
-    {
-      key: 'forcePathStyle',
-      label: '强制 Path Style',
-      type: 'switch',
-      description: 'MinIO 或部分兼容对象存储通常需要开启。',
-    },
+    { key: 'endpoint', label: 'Endpoint', type: 'input', required: true, placeholder: 'https://s3.amazonaws.com' },
+    { key: 'region', label: '区域', type: 'input', required: true, placeholder: 'ap-east-1' },
+    { key: 'bucket', label: 'Bucket', type: 'input', required: true, placeholder: 'backupx-prod' },
+    { key: 'accessKeyId', label: 'Access Key ID', type: 'input', required: true, sensitive: true, placeholder: 'AKIA...' },
+    { key: 'secretAccessKey', label: 'Secret Access Key', type: 'password', required: true, sensitive: true },
+    { key: 'forcePathStyle', label: '强制 Path Style', type: 'switch', description: 'MinIO 等兼容存储需要开启。' },
   ],
   webdav: [
-    {
-      key: 'endpoint',
-      label: 'WebDAV 地址',
-      type: 'input',
-      required: true,
-      placeholder: 'https://dav.example.com/remote.php/dav/files/admin',
-    },
-    {
-      key: 'username',
-      label: '用户名',
-      type: 'input',
-      required: true,
-      placeholder: 'admin',
-    },
-    {
-      key: 'password',
-      label: '密码',
-      type: 'password',
-      required: true,
-      sensitive: true,
-      placeholder: '输入新的 WebDAV 密码',
-    },
-    {
-      key: 'basePath',
-      label: '基础目录',
-      type: 'input',
-      placeholder: '/backupx',
-    },
+    { key: 'endpoint', label: 'WebDAV 地址', type: 'input', required: true, placeholder: 'https://dav.example.com/...' },
+    { key: 'username', label: '用户名', type: 'input', required: true },
+    { key: 'password', label: '密码', type: 'password', required: true, sensitive: true },
+    { key: 'basePath', label: '基础目录', type: 'input', placeholder: '/backupx' },
   ],
   google_drive: [
-    {
-      key: 'clientId',
-      label: 'Client ID',
-      type: 'input',
-      required: true,
-      sensitive: true,
-      placeholder: 'Google OAuth Client ID',
-    },
-    {
-      key: 'clientSecret',
-      label: 'Client Secret',
-      type: 'password',
-      required: true,
-      sensitive: true,
-      placeholder: '输入新的 Google Client Secret',
-    },
-    {
-      key: 'folderId',
-      label: '目标文件夹 ID',
-      type: 'input',
-      placeholder: '留空则使用根目录',
-    },
+    { key: 'clientId', label: 'Client ID', type: 'input', required: true, sensitive: true },
+    { key: 'clientSecret', label: 'Client Secret', type: 'password', required: true, sensitive: true },
+    { key: 'folderId', label: '目标文件夹 ID', type: 'input', placeholder: '留空则使用根目录' },
   ],
   aliyun_oss: [
-    {
-      key: 'region',
-      label: '区域 (Region)',
-      type: 'input',
-      required: true,
-      placeholder: 'cn-hangzhou',
-      description: '如 cn-hangzhou, cn-shanghai, cn-beijing, cn-shenzhen 等。系统会自动组装 Endpoint。',
-    },
-    {
-      key: 'bucket',
-      label: 'Bucket',
-      type: 'input',
-      required: true,
-      placeholder: 'my-backup-bucket',
-    },
-    {
-      key: 'accessKeyId',
-      label: 'AccessKey ID',
-      type: 'input',
-      required: true,
-      sensitive: true,
-      placeholder: 'LTAI...',
-    },
-    {
-      key: 'secretAccessKey',
-      label: 'AccessKey Secret',
-      type: 'password',
-      required: true,
-      sensitive: true,
-      placeholder: '输入新的 AccessKey Secret',
-    },
-    {
-      key: 'internalNetwork',
-      label: '使用内网 Endpoint',
-      type: 'switch',
-      description: '同一区域的 ECS 实例可启用内网传输，节省流量费用。',
-    },
+    { key: 'region', label: '区域', type: 'input', required: true, placeholder: 'cn-hangzhou' },
+    { key: 'bucket', label: 'Bucket', type: 'input', required: true },
+    { key: 'accessKeyId', label: 'AccessKey ID', type: 'input', required: true, sensitive: true },
+    { key: 'secretAccessKey', label: 'AccessKey Secret', type: 'password', required: true, sensitive: true },
+    { key: 'internalNetwork', label: '使用内网', type: 'switch' },
   ],
   tencent_cos: [
-    {
-      key: 'region',
-      label: '区域 (Region)',
-      type: 'input',
-      required: true,
-      placeholder: 'ap-guangzhou',
-      description: '如 ap-guangzhou, ap-shanghai, ap-beijing, ap-chengdu 等。系统会自动组装 Endpoint。',
-    },
-    {
-      key: 'bucket',
-      label: 'Bucket',
-      type: 'input',
-      required: true,
-      placeholder: 'backup-1250000000',
-      description: '格式为 BucketName-APPID，如 backup-1250000000。',
-    },
-    {
-      key: 'accessKeyId',
-      label: 'SecretId',
-      type: 'input',
-      required: true,
-      sensitive: true,
-      placeholder: 'AKIDxxxxxxxx',
-    },
-    {
-      key: 'secretAccessKey',
-      label: 'SecretKey',
-      type: 'password',
-      required: true,
-      sensitive: true,
-      placeholder: '输入新的 SecretKey',
-    },
+    { key: 'region', label: '区域', type: 'input', required: true, placeholder: 'ap-guangzhou' },
+    { key: 'bucket', label: 'Bucket', type: 'input', required: true, placeholder: 'backup-1250000000' },
+    { key: 'accessKeyId', label: 'SecretId', type: 'input', required: true, sensitive: true },
+    { key: 'secretAccessKey', label: 'SecretKey', type: 'password', required: true, sensitive: true },
   ],
   qiniu_kodo: [
-    {
-      key: 'region',
-      label: '区域 (Region)',
-      type: 'input',
-      required: true,
-      placeholder: 'z0',
-      description: '支持 z0(华东), cn-east-2(华东-浙江2), z1(华北), z2(华南), na0(北美), as0(东南亚)。',
-    },
-    {
-      key: 'bucket',
-      label: 'Bucket',
-      type: 'input',
-      required: true,
-      placeholder: 'my-backup',
-    },
-    {
-      key: 'accessKeyId',
-      label: 'AccessKey',
-      type: 'input',
-      required: true,
-      sensitive: true,
-      placeholder: '七牛云 AccessKey',
-    },
-    {
-      key: 'secretAccessKey',
-      label: 'SecretKey',
-      type: 'password',
-      required: true,
-      sensitive: true,
-      placeholder: '输入新的 SecretKey',
-    },
+    { key: 'region', label: '区域', type: 'input', required: true, placeholder: 'z0' },
+    { key: 'bucket', label: 'Bucket', type: 'input', required: true },
+    { key: 'accessKeyId', label: 'AccessKey', type: 'input', required: true, sensitive: true },
+    { key: 'secretAccessKey', label: 'SecretKey', type: 'password', required: true, sensitive: true },
   ],
-  rclone: [], // 动态表单，字段从 API 获取（见 StorageTargetFormDrawer）
   ftp: [
-    {
-      key: 'host',
-      label: '主机地址',
-      type: 'input',
-      required: true,
-      placeholder: 'ftp.example.com',
-    },
-    {
-      key: 'port',
-      label: '端口',
-      type: 'input',
-      placeholder: '21',
-      description: '默认 FTP 端口为 21。',
-    },
-    {
-      key: 'username',
-      label: '用户名',
-      type: 'input',
-      required: true,
-      placeholder: 'backup_user',
-    },
-    {
-      key: 'password',
-      label: '密码',
-      type: 'password',
-      required: true,
-      sensitive: true,
-      placeholder: '输入新的 FTP 密码',
-    },
-    {
-      key: 'basePath',
-      label: '基础目录',
-      type: 'input',
-      placeholder: '/backups',
-      description: 'FTP 服务器上的目标目录，留空使用根目录。',
-    },
-    {
-      key: 'useTLS',
-      label: '使用 TLS (FTPS)',
-      type: 'switch',
-      description: '启用 Explicit TLS 加密连接。',
-    },
+    { key: 'host', label: '主机地址', type: 'input', required: true, placeholder: 'ftp.example.com' },
+    { key: 'port', label: '端口', type: 'input', placeholder: '21' },
+    { key: 'username', label: '用户名', type: 'input', required: true },
+    { key: 'password', label: '密码', type: 'password', required: true, sensitive: true },
+    { key: 'basePath', label: '基础目录', type: 'input', placeholder: '/backups' },
+    { key: 'useTLS', label: 'TLS (FTPS)', type: 'switch' },
   ],
 }
 
-export function getStorageTargetFieldConfigs(type: StorageTargetType) {
-  return FIELD_CONFIG_MAP[type]
+const BUILTIN_TYPES = new Set(Object.keys(BUILTIN_FIELD_CONFIG))
+
+/** 是否为内置类型 */
+export function isBuiltinType(type: StorageTargetType): boolean {
+  return BUILTIN_TYPES.has(type)
+}
+
+/** 获取静态字段配置 */
+export function getStorageTargetFieldConfigs(type: StorageTargetType): StorageTargetFieldConfig[] {
+  return BUILTIN_FIELD_CONFIG[type] ?? []
+}
+
+const BUILTIN_LABELS: Record<string, string> = {
+  local_disk: '本地磁盘', google_drive: 'Google Drive', s3: 'S3 Compatible',
+  webdav: 'WebDAV', aliyun_oss: '阿里云 OSS', tencent_cos: '腾讯云 COS',
+  qiniu_kodo: '七牛云 Kodo', ftp: 'FTP', rclone: 'Rclone',
 }
 
-export function getStorageTargetTypeLabel(type: StorageTargetType) {
-  switch (type) {
-    case 'local_disk':
-      return '本地磁盘'
-    case 'google_drive':
-      return 'Google Drive'
-    case 's3':
-      return 'S3 Compatible'
-    case 'webdav':
-      return 'WebDAV'
-    case 'aliyun_oss':
-      return '阿里云 OSS'
-    case 'tencent_cos':
-      return '腾讯云 COS'
-    case 'qiniu_kodo':
-      return '七牛云 Kodo'
-    case 'ftp':
-      return 'FTP'
-    case 'rclone':
-      return 'Rclone (70+ 后端)'
-    default:
-      return type
-  }
+export function getStorageTargetTypeLabel(type: StorageTargetType): string {
+  return BUILTIN_LABELS[type] || type.toUpperCase()
 }
 
-export const storageTargetTypeOptions = [
+/** 内置类型选项（下拉框"常用"分组） */
+export const builtinTypeOptions = [
   { label: '本地磁盘', value: 'local_disk' },
   { label: '阿里云 OSS', value: 'aliyun_oss' },
   { label: '腾讯云 COS', value: 'tencent_cos' },
@@ -301,5 +85,4 @@ export const storageTargetTypeOptions = [
   { label: 'Google Drive', value: 'google_drive' },
   { label: 'WebDAV', value: 'webdav' },
   { label: 'FTP', value: 'ftp' },
-  { label: 'Rclone — SFTP / Azure / Dropbox / OneDrive 等 70+ 后端', value: 'rclone' },
-] as const
+]
diff --git a/web/src/types/storage-targets.ts b/web/src/types/storage-targets.ts
index 5f76b9c..a0c26b8 100644
--- a/web/src/types/storage-targets.ts
+++ b/web/src/types/storage-targets.ts
@@ -1,4 +1,5 @@
-export type StorageTargetType = 'local_disk' | 'google_drive' | 's3' | 'webdav' | 'aliyun_oss' | 'tencent_cos' | 'qiniu_kodo' | 'ftp' | 'rclone'
+// 内置类型 + 全部 rclone 后端名（sftp, azureblob, dropbox 等）
+export type StorageTargetType = string
 export type StorageTestStatus = 'unknown' | 'success' | 'failed'
 export type StorageFieldType = 'input' | 'password' | 'switch'