diff --git a/components/Sandboxes/SandboxFileTree.tsx b/components/Sandboxes/SandboxFileTree.tsx
index cd9d246d3..53af97e16 100644
--- a/components/Sandboxes/SandboxFileTree.tsx
+++ b/components/Sandboxes/SandboxFileTree.tsx
@@ -1,15 +1,75 @@
 "use client";
 
+import { useState, useCallback } from "react";
 import { FileTree } from "@/components/ai-elements/file-tree";
 import FileNodeComponent from "./FileNodeComponent";
 import SandboxFilePreview from "./SandboxFilePreview";
 import useSandboxes from "@/hooks/useSandboxes";
 import useSandboxFileContent from "@/hooks/useSandboxFileContent";
-import { Loader } from "lucide-react";
+import useUploadSandboxFiles from "@/hooks/useUploadSandboxFiles";
+import { useDragAndDrop } from "@/hooks/useDragAndDrop";
+import { toast } from "sonner";
+import { Loader, Upload } from "lucide-react";
+import type { FileNode } from "@/lib/sandboxes/parseFileTree";
+
+function getFirstFolderPath(nodes: FileNode[]): string {
+  for (const node of nodes) {
+    if (node.type === "folder") return node.path;
+  }
+  return "";
+}
+
+function getParentFolder(filePath: string): string {
+  const parts = filePath.split("/");
+  parts.pop();
+  return parts.join("/");
+}
 
 export default function SandboxFileTree() {
   const { filetree, isLoading, error, refetch } = useSandboxes();
   const fileContent = useSandboxFileContent();
+  const { upload, isUploading } = useUploadSandboxFiles();
+  const [dropFolder, setDropFolder] = useState<string>("");
+
+  const resolvedDropFolder =
+    dropFolder ||
+    (fileContent.selectedPath ? getParentFolder(fileContent.selectedPath) : "") ||
+    getFirstFolderPath(filetree);
+
+  const handleDrop = useCallback(
+    async (files: File[]) => {
+      if (!resolvedDropFolder) {
+        toast.error("No folder selected. Select a file or folder first.");
+        return;
+      }
+
+      toast.loading(`Uploading ${files.length} file${files.length > 1 ? "s" : ""}…`, {
+        id: "sandbox-upload",
+      });
+
+      const results = await upload(files, resolvedDropFolder);
+
+      const succeeded = results.filter((r) => r.success).length;
+      const failed = results.filter((r) => !r.success);
+
+      toast.dismiss("sandbox-upload");
+
+      if (succeeded > 0) {
+        toast.success(`${succeeded} file${succeeded > 1 ? "s" : ""} uploaded successfully`);
+        refetch();
+      }
+
+      for (const f of failed) {
+        toast.error(`Failed to upload ${f.path}: ${f.error ?? "unknown error"}`);
+      }
+    },
+    [resolvedDropFolder, upload, refetch],
+  );
+
+  const { getRootProps, getInputProps, isDragging } = useDragAndDrop({
+    onDrop: handleDrop,
+    disabled: isUploading,
+  });
 
   if (isLoading) {
     return (
@@ -24,10 +84,7 @@ export default function SandboxFileTree() {
     return (
       <div className="text-destructive">
         <p>Failed to load files</p>
-        <button
-          onClick={() => refetch()}
-          className="text-sm underline hover:no-underline"
-        >
+        <button onClick={() => refetch()} className="text-sm underline hover:no-underline">
           Try again
         </button>
       </div>
@@ -36,7 +93,8 @@ export default function SandboxFileTree() {
 
   if (filetree.length === 0) {
     return (
-      <div className="w-full max-w-md">
+      <div {...getRootProps()} className="w-full max-w-md">
+        <input {...getInputProps()} />
         <p className="text-sm text-muted-foreground">No files yet.</p>
       </div>
     );
@@ -45,12 +103,70 @@ export default function SandboxFileTree() {
   return (
     <div className="flex w-full flex-col gap-4 lg:flex-row">
       <div className="w-full lg:max-w-md lg:shrink-0">
-        <h2 className="mb-2 text-lg font-medium">Repository Files</h2>
-        <FileTree selectedPath={fileContent.selectedPath} onSelect={fileContent.select}>
-          {filetree.map((node) => (
-            <FileNodeComponent key={node.path} node={node} />
-          ))}
-        </FileTree>
+        <div
+          {...getRootProps()}
+          className={`relative rounded-lg border border-dashed transition-colors ${
+            isDragging
+              ? "border-primary bg-primary/5"
+              : "border-transparent hover:border-muted-foreground/30"
+          }`}
+        >
+          <input {...getInputProps()} />
+
+          {isDragging && (
+            <div className="pointer-events-none absolute inset-0 z-10 flex flex-col items-center justify-center gap-2 rounded-lg bg-background/80">
+              <Upload className="h-8 w-8 text-primary" />
+              <p className="text-sm font-medium text-primary">
+                Drop files into{" "}
+                <span className="font-mono text-xs">
+                  {resolvedDropFolder || "repository root"}
+                </span>
+              </p>
+            </div>
+          )}
+
+          <div className="p-1">
+            <div className="mb-2 flex items-center justify-between">
+              <h2 className="text-lg font-medium">Repository Files</h2>
+              {isUploading && (
+                <span className="flex items-center gap-1 text-xs text-muted-foreground">
+                  <Loader className="h-3 w-3 animate-spin" />
+                  Uploading…
+                </span>
+              )}
+            </div>
+
+            {resolvedDropFolder && (
+              <div className="mb-2 flex items-center gap-1">
+                <Upload className="h-3 w-3 text-muted-foreground" />
+                <p className="truncate font-mono text-xs text-muted-foreground">
+                  Drop target:{" "}
+                  <button
+                    className="underline decoration-dotted hover:text-foreground"
+                    onClick={() => setDropFolder("")}
+                    title="Reset to default"
+                  >
+                    {resolvedDropFolder}
+                  </button>
+                </p>
+              </div>
+            )}
+
+            <FileTree
+              selectedPath={fileContent.selectedPath}
+              onSelect={(path) => {
+                fileContent.select(path);
+                // Update drop folder to parent of selected file
+                const parent = getParentFolder(path);
+                if (parent) setDropFolder(parent);
+              }}
+            >
+              {filetree.map((node) => (
+                <FileNodeComponent key={node.path} node={node} />
+              ))}
+            </FileTree>
+          </div>
+        </div>
       </div>
       {fileContent.selectedPath && (
         <SandboxFilePreview
diff --git a/hooks/useUploadSandboxFiles.ts b/hooks/useUploadSandboxFiles.ts
new file mode 100644
index 000000000..97e96b478
--- /dev/null
+++ b/hooks/useUploadSandboxFiles.ts
@@ -0,0 +1,42 @@
+"use client";
+
+import { useState } from "react";
+import { usePrivy } from "@privy-io/react-auth";
+import { uploadFilesToSandbox } from "@/lib/sandboxes/uploadFilesToSandbox";
+import type { UploadFileResult } from "@/lib/sandboxes/uploadFilesToSandbox";
+
+interface UseUploadSandboxFilesReturn {
+  upload: (files: File[], folder: string) => Promise<UploadFileResult[]>;
+  isUploading: boolean;
+  error: string | null;
+}
+
+export default function useUploadSandboxFiles(): UseUploadSandboxFilesReturn {
+  const { getAccessToken } = usePrivy();
+  const [isUploading, setIsUploading] = useState(false);
+  const [error, setError] = useState<string | null>(null);
+
+  const upload = async (files: File[], folder: string): Promise<UploadFileResult[]> => {
+    setIsUploading(true);
+    setError(null);
+    try {
+      const accessToken = await getAccessToken();
+      if (!accessToken) {
+        throw new Error("Please sign in to upload files");
+      }
+      const response = await uploadFilesToSandbox(accessToken, files, folder);
+      if (response.status === "error") {
+        throw new Error(response.error ?? "Upload failed");
+      }
+      return response.uploaded ?? [];
+    } catch (err) {
+      const message = err instanceof Error ? err.message : "Upload failed";
+      setError(message);
+      return [];
+    } finally {
+      setIsUploading(false);
+    }
+  };
+
+  return { upload, isUploading, error };
+}
diff --git a/lib/sandboxes/uploadFilesToSandbox.ts b/lib/sandboxes/uploadFilesToSandbox.ts
new file mode 100644
index 000000000..c6e593124
--- /dev/null
+++ b/lib/sandboxes/uploadFilesToSandbox.ts
@@ -0,0 +1,44 @@
+import { NEW_API_BASE_URL } from "@/lib/consts";
+
+export interface UploadFileResult {
+  path: string;
+  success: boolean;
+  error?: string;
+}
+
+export interface UploadFilesResponse {
+  status: "success" | "error";
+  uploaded?: UploadFileResult[];
+  error?: string;
+}
+
+/**
+ * Uploads files to the account's GitHub org submodule via the sandbox files API.
+ *
+ * @param accessToken - Privy access token for authentication
+ * @param files - Array of File objects to upload
+ * @param folder - Target folder path within the repo (e.g. ".openclaw/workspace/orgs/myorg")
+ * @returns Upload results per file
+ */
+export async function uploadFilesToSandbox(
+  accessToken: string,
+  files: File[],
+  folder: string,
+): Promise<UploadFilesResponse> {
+  const formData = new FormData();
+  for (const file of files) {
+    formData.append("files", file);
+  }
+  formData.append("folder", folder);
+
+  const response = await fetch(`${NEW_API_BASE_URL}/api/sandboxes/files`, {
+    method: "POST",
+    headers: {
+      Authorization: `Bearer ${accessToken}`,
+    },
+    body: formData,
+  });
+
+  const data: UploadFilesResponse = await response.json();
+  return data;
+}