diff --git a/CHANGELOG.md b/CHANGELOG.md
index 09328787..f968350b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,6 +3,7 @@
 
 ### Added
 
+- Added `Bitrix24\SDK\Services\IM\Disk\Service\Disk` with `getFolderId(?int $chatId = null, ?string $dialogId = null)` for `im.disk.folder.get`, plus dedicated `FolderIdResult`, IM builder registration, and focused unit/integration coverage ([#435](https://github.com/bitrix24/b24phpsdk/issues/435))
 - Added `Bitrix24\SDK\Services\IM\Placements\PlacementLocationCodes` with constants `IM_TEXTAREA`, `IM_SIDEBAR`, `IM_CONTEXT_MENU`, `IM_NAVIGATION`, and `IM_SMILES_SELECTOR` (deprecated since `im 25.1600.0`) for IM widget placement codes ([#437](https://github.com/bitrix24/b24phpsdk/issues/437))
 - Added `PlacementOptionsInterface` and fluent option builders `TextareaPlacementOptions`, `SidebarPlacementOptions`, `ContextMenuPlacementOptions` under `Bitrix24\SDK\Services\IM\Placements` namespace, backed by `ChatContext`, `PlacementColor` (IM-specific) and shared `Role`, `ExtranetAvailability` string-backed enums under `Bitrix24\SDK\Services\Placement` ([#437](https://github.com/bitrix24/b24phpsdk/issues/437))
 - Added integration test `PlacementLocationCodesTest` that asserts (via reflection) every `IM_`-prefixed code returned by `placement.list` is declared as a constant in `PlacementLocationCodes` ([#437](https://github.com/bitrix24/b24phpsdk/issues/437))
diff --git a/Makefile b/Makefile
index f54dcabb..3dc4f142 100644
--- a/Makefile
+++ b/Makefile
@@ -60,6 +60,7 @@ help:
 	@echo "test-integration-calendar-event - run Calendar Event integration tests"
 	@echo "test-integration-calendar-resource - run Calendar Resource integration tests"
 	@echo "test-integration-sale-basket-property - run BasketProperty integration tests"
+	@echo "test-integration-im-disk - run IM Disk integration tests"
 	@echo "test-integration-sale-cashbox-handler - run CashboxHandler integration tests"
 	@echo "test-integration-sale-cashbox - run Cashbox integration tests"
 	@echo "test-integration-sale-delivery - run Delivery integration tests"
@@ -200,6 +201,10 @@ test-integration-scope-workflows:
 test-integration-scope-im:
 	docker compose run --rm php-cli vendor/bin/phpunit --testsuite integration_tests_scope_im
 
+.PHONY: test-integration-im-disk
+test-integration-im-disk:
+	docker compose run --rm php-cli vendor/bin/phpunit --testsuite integration_tests_im_disk
+
 .PHONY: test-integration-scope-placement
 test-integration-scope-placement:
 	docker compose run --rm php-cli vendor/bin/phpunit --testsuite integration_tests_scope_placement
diff --git a/docs/superpowers/plans/2026-04-19-im-disk-folder-get.md b/docs/superpowers/plans/2026-04-19-im-disk-folder-get.md
new file mode 100644
index 00000000..7eecd993
--- /dev/null
+++ b/docs/superpowers/plans/2026-04-19-im-disk-folder-get.md
@@ -0,0 +1,360 @@
+# IM Disk Folder Get Implementation Plan
+
+> **For agentic workers:** REQUIRED SUB-SKILL: Use superpowers:subagent-driven-development (recommended) or superpowers:executing-plans to implement this plan task-by-task. Steps use checkbox (`- [ ]`) syntax for tracking.
+
+**Goal:** Add SDK support for `im.disk.folder.get` through a dedicated IM Disk service, builder accessor, result wrapper, tests, and dedicated integration wiring.
+
+**Architecture:** Follow the existing service pattern used across the SDK: a focused service class under `src/Services/IM/Disk/Service`, a tiny custom result object for the `result.ID` envelope, builder registration in `IMServiceBuilder`, and targeted unit/integration tests. Keep the scope narrow to `im.disk.folder.get`; do not introduce broader `im.disk.*` abstractions in this task.
+
+**Tech Stack:** PHP 8.4, PHPUnit 12, Bitrix24 PHP SDK service/result patterns, Docker-based `make` test targets
+
+---
+
+### Task 1: Lock the contract with failing unit tests
+
+**Files:**
+- Create: `tests/Unit/Services/IM/Disk/Service/DiskTest.php`
+- Modify: `tests/Unit/Services/IM/IMServiceBuilderTest.php`
+- Read: `src/Services/IM/IMServiceBuilder.php`
+- Read: `src/Services/IMOpenLines/Session/Service/Session.php`
+
+- [ ] **Step 1: Write the failing builder test**
+
+Add a new assertion to `tests/Unit/Services/IM/IMServiceBuilderTest.php`:
+
+```php
+use Bitrix24\SDK\Services\IM\Disk\Service\Disk;
+
+public function testGetDiskService(): void
+{
+    $this->assertInstanceOf(Disk::class, $this->serviceBuilder->disk());
+    $this->assertSame($this->serviceBuilder->disk(), $this->serviceBuilder->disk());
+}
+```
+
+- [ ] **Step 2: Write the failing service contract test**
+
+Create `tests/Unit/Services/IM/Disk/Service/DiskTest.php`:
+
+```php
+<?php
+
+declare(strict_types=1);
+
+namespace Bitrix24\SDK\Tests\Unit\Services\IM\Disk\Service;
+
+use Bitrix24\SDK\Core\ApiLevelErrorHandler;
+use Bitrix24\SDK\Core\Commands\Command;
+use Bitrix24\SDK\Core\Contracts\ApiVersion;
+use Bitrix24\SDK\Core\Contracts\CoreInterface;
+use Bitrix24\SDK\Core\Response\Response;
+use Bitrix24\SDK\Services\IM\Disk\Result\FolderIdResult;
+use Bitrix24\SDK\Services\IM\Disk\Service\Disk;
+use PHPUnit\Framework\Attributes\CoversClass;
+use PHPUnit\Framework\TestCase;
+use Psr\Log\NullLogger;
+use Symfony\Component\HttpClient\Response\MockResponse;
+
+#[CoversClass(Disk::class)]
+final class DiskTest extends TestCase
+{
+    public function testGetFolderIdMapsChatIdAndDialogId(): void
+    {
+        $core = $this->createMock(CoreInterface::class);
+        $core
+            ->expects($this->once())
+            ->method('call')
+            ->with(
+                'im.disk.folder.get',
+                [
+                    'CHAT_ID' => 17,
+                    'DIALOG_ID' => 'chat17',
+                ],
+                ApiVersion::v1
+            )
+            ->willReturn(
+                new Response(
+                    new MockResponse(json_encode(['result' => ['ID' => 5153]], JSON_THROW_ON_ERROR)),
+                    new Command('im.disk.folder.get', []),
+                    new ApiLevelErrorHandler(new NullLogger()),
+                    new NullLogger()
+                )
+            );
+
+        $result = (new Disk($core, new NullLogger()))->getFolderId(17, 'chat17');
+
+        $this->assertInstanceOf(FolderIdResult::class, $result);
+        $this->assertSame(5153, $result->getId());
+    }
+}
+```
+
+- [ ] **Step 3: Run the targeted unit tests to verify they fail**
+
+Run:
+
+```bash
+docker compose run --rm php-cli vendor/bin/phpunit tests/Unit/Services/IM/IMServiceBuilderTest.php tests/Unit/Services/IM/Disk/Service/DiskTest.php --display-warnings
+```
+
+Expected:
+- `IMServiceBuilderTest` fails because `disk()` does not exist yet
+- `DiskTest` fails because the new service/result classes do not exist yet
+
+- [ ] **Step 4: Commit the red tests**
+
+```bash
+git add tests/Unit/Services/IM/IMServiceBuilderTest.php tests/Unit/Services/IM/Disk/Service/DiskTest.php
+git commit -m "test: lock IM disk service contract"
+```
+
+### Task 2: Implement the minimal IM Disk service and make unit tests pass
+
+**Files:**
+- Create: `src/Services/IM/Disk/Result/FolderIdResult.php`
+- Create: `src/Services/IM/Disk/Service/Disk.php`
+- Modify: `src/Services/IM/IMServiceBuilder.php`
+- Test: `tests/Unit/Services/IM/Disk/Service/DiskTest.php`
+- Test: `tests/Unit/Services/IM/IMServiceBuilderTest.php`
+
+- [ ] **Step 1: Add the dedicated result wrapper**
+
+Create `src/Services/IM/Disk/Result/FolderIdResult.php`:
+
+```php
+<?php
+
+declare(strict_types=1);
+
+namespace Bitrix24\SDK\Services\IM\Disk\Result;
+
+use Bitrix24\SDK\Core\Result\AbstractResult;
+
+final class FolderIdResult extends AbstractResult
+{
+    public function getId(): int
+    {
+        return (int)$this->getCoreResponse()->getResponseData()->getResult()['ID'];
+    }
+}
+```
+
+- [ ] **Step 2: Add the IM Disk service**
+
+Create `src/Services/IM/Disk/Service/Disk.php`:
+
+```php
+<?php
+
+declare(strict_types=1);
+
+namespace Bitrix24\SDK\Services\IM\Disk\Service;
+
+use Bitrix24\SDK\Attributes\ApiEndpointMetadata;
+use Bitrix24\SDK\Attributes\ApiServiceMetadata;
+use Bitrix24\SDK\Core\Credentials\Scope;
+use Bitrix24\SDK\Services\AbstractService;
+use Bitrix24\SDK\Services\IM\Disk\Result\FolderIdResult;
+
+#[ApiServiceMetadata(new Scope(['im']))]
+final class Disk extends AbstractService
+{
+    #[ApiEndpointMetadata(
+        'im.disk.folder.get',
+        'https://apidocs.bitrix24.ru/api-reference/chats/files/im-disk-folder-get.html',
+        'Get the identifier of the folder where chat files are stored'
+    )]
+    public function getFolderId(?int $chatId = null, ?string $dialogId = null): FolderIdResult
+    {
+        $params = [];
+
+        if ($chatId !== null) {
+            $params['CHAT_ID'] = $chatId;
+        }
+
+        if ($dialogId !== null) {
+            $params['DIALOG_ID'] = $dialogId;
+        }
+
+        return new FolderIdResult($this->core->call('im.disk.folder.get', $params));
+    }
+}
+```
+
+- [ ] **Step 3: Register the service in the IM builder**
+
+Update `src/Services/IM/IMServiceBuilder.php`:
+
+```php
+use Bitrix24\SDK\Services\IM\Disk\Service\Disk;
+
+public function disk(): Disk
+{
+    if (!isset($this->serviceCache[__METHOD__])) {
+        $this->serviceCache[__METHOD__] = new Disk($this->core, $this->log);
+    }
+
+    return $this->serviceCache[__METHOD__];
+}
+```
+
+- [ ] **Step 4: Re-run the targeted unit tests to verify green**
+
+Run:
+
+```bash
+docker compose run --rm php-cli vendor/bin/phpunit tests/Unit/Services/IM/IMServiceBuilderTest.php tests/Unit/Services/IM/Disk/Service/DiskTest.php --display-warnings
+```
+
+Expected:
+- both files pass
+- no warnings or risky tests
+
+- [ ] **Step 5: Run the full unit suite to catch regressions**
+
+Run:
+
+```bash
+make test-unit
+```
+
+Expected:
+- `OK`
+- the total test count increases from the current baseline
+
+- [ ] **Step 6: Commit the implementation**
+
+```bash
+git add src/Services/IM/Disk/Result/FolderIdResult.php src/Services/IM/Disk/Service/Disk.php src/Services/IM/IMServiceBuilder.php
+git add tests/Unit/Services/IM/IMServiceBuilderTest.php tests/Unit/Services/IM/Disk/Service/DiskTest.php
+git commit -m "feat: add IM disk folder getter"
+```
+
+### Task 3: Add integration coverage, suite wiring, and changelog entry
+
+**Files:**
+- Create: `tests/Integration/Services/IM/Disk/Service/DiskTest.php`
+- Modify: `phpunit.xml.dist`
+- Modify: `Makefile`
+- Modify: `CHANGELOG.md`
+- Test: `tests/Integration/Services/IM/Disk/Service/DiskTest.php`
+
+- [ ] **Step 1: Write the failing integration test**
+
+Create `tests/Integration/Services/IM/Disk/Service/DiskTest.php`:
+
+```php
+<?php
+
+declare(strict_types=1);
+
+namespace Bitrix24\SDK\Tests\Integration\Services\IM\Disk\Service;
+
+use Bitrix24\SDK\Core\Exceptions\BaseException;
+use Bitrix24\SDK\Core\Exceptions\TransportException;
+use Bitrix24\SDK\Services\IM\Disk\Service\Disk;
+use Bitrix24\SDK\Tests\Integration\Factory;
+use PHPUnit\Framework\Attributes\CoversClass;
+use PHPUnit\Framework\TestCase;
+
+#[CoversClass(Disk::class)]
+final class DiskTest extends TestCase
+{
+    private Disk $diskService;
+
+    #[\Override]
+    protected function setUp(): void
+    {
+        $this->diskService = Factory::getServiceBuilder()->getIMScope()->disk();
+    }
+
+    /**
+     * @throws BaseException
+     * @throws TransportException
+     */
+    public function testGetFolderId(): void
+    {
+        $userId = (int)$this->diskService->core->call('PROFILE')->getResponseData()->getResult()['ID'];
+        $chatId = (int)$this->diskService->core->call(
+            'im.chat.add',
+            [
+                'USERS' => [$userId],
+                'TYPE' => 'CHAT',
+                'TITLE' => sprintf('IM Disk Test %s', time()),
+            ]
+        )->getResponseData()->getResult()[0];
+
+        try {
+            $folderId = $this->diskService->getFolderId(dialogId: 'chat' . $chatId)->getId();
+
+            $this->assertGreaterThan(0, $folderId);
+        } finally {
+            $this->diskService->core->call('im.chat.leave', ['CHAT_ID' => $chatId]);
+        }
+    }
+}
+```
+
+- [ ] **Step 2: Wire a dedicated PHPUnit suite and Make target**
+
+Update `phpunit.xml.dist` near the other IM suites:
+
+```xml
+<testsuite name="integration_tests_im_disk">
+    <directory>./tests/Integration/Services/IM/Disk/</directory>
+</testsuite>
+```
+
+Update `Makefile` help and target sections:
+
+```make
+@echo "test-integration-im-disk - run IM Disk integration tests"
+
+.PHONY: test-integration-im-disk
+test-integration-im-disk:
+	docker compose run --rm php-cli vendor/bin/phpunit --testsuite integration_tests_im_disk
+```
+
+- [ ] **Step 3: Add the changelog entry**
+
+Update `CHANGELOG.md` under `## 3.2.0 – UNRELEASED` / `### Added`:
+
+```markdown
+- Added `Bitrix24\SDK\Services\IM\Disk\Service\Disk` with `getFolderId(?int $chatId = null, ?string $dialogId = null)` for `im.disk.folder.get`, plus dedicated `FolderIdResult`, IM builder registration, and focused unit/integration coverage ([#435](https://github.com/bitrix24/b24phpsdk/issues/435))
+```
+
+- [ ] **Step 4: Run the targeted integration suite and verify it starts red, then green after wiring**
+
+Run:
+
+```bash
+make test-integration-im-disk
+```
+
+Expected before wiring:
+- `No tests executed` or unknown testsuite / missing file failure
+
+Expected after wiring and implementation:
+- the new IM Disk integration test passes
+
+- [ ] **Step 5: Run the final verification set**
+
+Run:
+
+```bash
+docker compose run --rm php-cli vendor/bin/phpunit tests/Unit/Services/IM/Disk/Service/DiskTest.php tests/Unit/Services/IM/IMServiceBuilderTest.php --display-warnings
+make test-unit
+make test-integration-im-disk
+```
+
+Expected:
+- targeted unit tests pass
+- full unit suite stays green
+- IM Disk integration suite passes
+
+- [ ] **Step 6: Commit the integration and release wiring**
+
+```bash
+git add tests/Integration/Services/IM/Disk/Service/DiskTest.php phpunit.xml.dist Makefile CHANGELOG.md
+git commit -m "test: cover IM disk folder getter"
+```
diff --git a/docs/superpowers/specs/2026-04-19-im-disk-folder-get-design.md b/docs/superpowers/specs/2026-04-19-im-disk-folder-get-design.md
new file mode 100644
index 00000000..7e34c49e
--- /dev/null
+++ b/docs/superpowers/specs/2026-04-19-im-disk-folder-get-design.md
@@ -0,0 +1,79 @@
+# Design: IM Disk folder getter for issue #435
+
+## Goal
+
+Add SDK support for the Bitrix24 REST method `im.disk.folder.get` in a minimal way that matches the scope of issue `#435`.
+
+## Scope
+
+In scope:
+- add a new IM Disk service class under `src/Services/IM/Disk/Service/Disk.php`
+- add one public method for `im.disk.folder.get`
+- expose the service through `IMServiceBuilder::disk()`
+- add unit coverage for the new service and builder accessor
+- add integration coverage for the IM Disk service
+- add a dedicated PHPUnit suite and `make test-integration-im-disk` target
+- add a `CHANGELOG.md` entry under `3.2.0 – UNRELEASED` / `### Added`
+
+Out of scope:
+- adding any other `im.disk.*` methods
+- introducing result-item abstractions beyond what is needed for the single returned folder id
+- refactoring unrelated IM services
+
+## Design
+
+### Service layout
+
+Create `Bitrix24\SDK\Services\IM\Disk\Service\Disk` as a regular `AbstractService` subclass with:
+- `#[ApiServiceMetadata(new Scope(['im']))]`
+- one method `getFolderId(?int $chatId = null, ?string $dialogId = null): FolderIdResult`
+
+The method calls `im.disk.folder.get` and maps optional request parameters to `CHAT_ID` / `DIALOG_ID`.
+Bitrix24 requires at least one of these parameters, but the SDK method can forward them as nullable values and leave cross-field validation to the API, matching existing service patterns.
+
+Because the response shape is `result.ID`, add a dedicated result wrapper instead of relying on a non-existent generic integer result class:
+- `src/Services/IM/Disk/Result/FolderIdResult.php`
+- `FolderIdResult::getId(): int`
+
+This keeps the implementation aligned with the existing service pattern in the SDK while avoiding speculative expansion for future `im.disk.*` methods.
+
+### Service builder integration
+
+Extend `Bitrix24\SDK\Services\IM\IMServiceBuilder` with:
+- import for the new IM Disk service
+- cached accessor `disk(): \Bitrix24\SDK\Services\IM\Disk\Service\Disk`
+
+The accessor should follow the same caching behavior already used by `notify()` and `placements()`.
+
+### Tests
+
+Unit coverage:
+- extend `tests/Unit/Services/IM/IMServiceBuilderTest.php` with an assertion that `disk()` returns the new service and is cached
+- add `tests/Unit/Services/IM/Disk/Service/DiskTest.php` to verify:
+  - the REST method name `im.disk.folder.get`
+  - `CHAT_ID` / `DIALOG_ID` parameter mapping
+  - the service returns `FolderIdResult`
+
+Integration coverage:
+- add `tests/Integration/Services/IM/Disk/Service/DiskTest.php`
+- verify `Factory::getServiceBuilder()->getIMScope()->disk()->getFolderId(dialogId: 'chat...')` returns a positive folder id
+
+Test execution wiring:
+- add a dedicated suite to `phpunit.xml.dist` for the new integration test path
+- add `make test-integration-im-disk` to run only that suite
+
+## Error handling
+
+No custom error handling is needed. The new service should reuse the existing transport and API exception flow provided by `AbstractService` and `Core`.
+
+## Verification
+
+Minimum verification for the implementation phase:
+- targeted unit tests for the new service and builder
+- targeted integration test for `im.disk.folder.get`
+- changelog entry references issue `#435`
+
+## Risks
+
+- The REST response shape is `result.ID`, so the new custom `FolderIdResult` must read the nested key correctly.
+- The new PHPUnit suite name and Make target must follow existing repository conventions to avoid drift in local developer workflows.
diff --git a/phpunit.xml.dist b/phpunit.xml.dist
index d0400826..772d730d 100644
--- a/phpunit.xml.dist
+++ b/phpunit.xml.dist
@@ -22,6 +22,9 @@
         <testsuite name="integration_tests_scope_im">
             <directory>./tests/Integration/Services/IM/</directory>
         </testsuite>
+        <testsuite name="integration_tests_im_disk">
+            <directory>./tests/Integration/Services/IM/Disk/</directory>
+        </testsuite>
         <testsuite name="integration_tests_scope_im_open_lines">
             <directory>./tests/Integration/Services/IMOpenLines/</directory>
         </testsuite>
diff --git a/src/Services/IM/Disk/Result/FolderIdResult.php b/src/Services/IM/Disk/Result/FolderIdResult.php
new file mode 100644
index 00000000..1b66c7d1
--- /dev/null
+++ b/src/Services/IM/Disk/Result/FolderIdResult.php
@@ -0,0 +1,24 @@
+<?php
+
+/**
+ * This file is part of the bitrix24-php-sdk package.
+ *
+ * © Maksim Mesilov <mesilov.maxim@gmail.com>
+ *
+ * For the full copyright and license information, please view the MIT-LICENSE.txt
+ * file that was distributed with this source code.
+ */
+
+declare(strict_types=1);
+
+namespace Bitrix24\SDK\Services\IM\Disk\Result;
+
+use Bitrix24\SDK\Core\Result\AbstractResult;
+
+class FolderIdResult extends AbstractResult
+{
+    public function getId(): int
+    {
+        return (int)$this->getCoreResponse()->getResponseData()->getResult()['ID'];
+    }
+}
diff --git a/src/Services/IM/Disk/Service/Disk.php b/src/Services/IM/Disk/Service/Disk.php
new file mode 100644
index 00000000..6b8f64f0
--- /dev/null
+++ b/src/Services/IM/Disk/Service/Disk.php
@@ -0,0 +1,50 @@
+<?php
+
+/**
+ * This file is part of the bitrix24-php-sdk package.
+ *
+ * © Maksim Mesilov <mesilov.maxim@gmail.com>
+ *
+ * For the full copyright and license information, please view the MIT-LICENSE.txt
+ * file that was distributed with this source code.
+ */
+
+declare(strict_types=1);
+
+namespace Bitrix24\SDK\Services\IM\Disk\Service;
+
+use Bitrix24\SDK\Attributes\ApiEndpointMetadata;
+use Bitrix24\SDK\Attributes\ApiServiceMetadata;
+use Bitrix24\SDK\Core\Credentials\Scope;
+use Bitrix24\SDK\Core\Exceptions\BaseException;
+use Bitrix24\SDK\Core\Exceptions\TransportException;
+use Bitrix24\SDK\Services\AbstractService;
+use Bitrix24\SDK\Services\IM\Disk\Result\FolderIdResult;
+
+#[ApiServiceMetadata(new Scope(['im']))]
+class Disk extends AbstractService
+{
+    /**
+     * @throws BaseException
+     * @throws TransportException
+     */
+    #[ApiEndpointMetadata(
+        'im.disk.folder.get',
+        'https://apidocs.bitrix24.ru/api-reference/chats/files/im-disk-folder-get.html',
+        'Get the identifier of the folder where chat files are stored'
+    )]
+    public function getFolderId(?int $chatId = null, ?string $dialogId = null): FolderIdResult
+    {
+        $params = [];
+
+        if ($chatId !== null) {
+            $params['CHAT_ID'] = $chatId;
+        }
+
+        if ($dialogId !== null) {
+            $params['DIALOG_ID'] = $dialogId;
+        }
+
+        return new FolderIdResult($this->core->call('im.disk.folder.get', $params));
+    }
+}
diff --git a/src/Services/IM/IMServiceBuilder.php b/src/Services/IM/IMServiceBuilder.php
index bb5ab9cc..cf123b3d 100644
--- a/src/Services/IM/IMServiceBuilder.php
+++ b/src/Services/IM/IMServiceBuilder.php
@@ -16,6 +16,7 @@
 use Bitrix24\SDK\Attributes\ApiServiceBuilderMetadata;
 use Bitrix24\SDK\Core\Credentials\Scope;
 use Bitrix24\SDK\Services\AbstractServiceBuilder;
+use Bitrix24\SDK\Services\IM\Disk\Service\Disk;
 use Bitrix24\SDK\Services\IM\Notify\Service\Notify;
 use Bitrix24\SDK\Services\IM\Placements\PlacementLocationCodes;
 use Bitrix24\SDK\Services\IM\Placements\Placements;
@@ -24,6 +25,15 @@
 #[ApiServiceBuilderMetadata(new Scope(['im']))]
 class IMServiceBuilder extends AbstractServiceBuilder
 {
+    public function disk(): Disk
+    {
+        if (!isset($this->serviceCache[__METHOD__])) {
+            $this->serviceCache[__METHOD__] = new Disk($this->core, $this->log);
+        }
+
+        return $this->serviceCache[__METHOD__];
+    }
+
     public function notify(): Notify
     {
         if (!isset($this->serviceCache[__METHOD__])) {
diff --git a/tests/Integration/Services/IM/Disk/Service/DiskTest.php b/tests/Integration/Services/IM/Disk/Service/DiskTest.php
new file mode 100644
index 00000000..b4f169ff
--- /dev/null
+++ b/tests/Integration/Services/IM/Disk/Service/DiskTest.php
@@ -0,0 +1,58 @@
+<?php
+
+/**
+ * This file is part of the bitrix24-php-sdk package.
+ *
+ * © Maksim Mesilov <mesilov.maxim@gmail.com>
+ *
+ * For the full copyright and license information, please view the MIT-LICENSE.txt
+ * file that was distributed with this source code.
+ */
+
+declare(strict_types=1);
+
+namespace Bitrix24\SDK\Tests\Integration\Services\IM\Disk\Service;
+
+use Bitrix24\SDK\Core\Exceptions\BaseException;
+use Bitrix24\SDK\Core\Exceptions\TransportException;
+use Bitrix24\SDK\Services\IM\Disk\Service\Disk;
+use Bitrix24\SDK\Tests\Integration\Factory;
+use PHPUnit\Framework\Attributes\CoversClass;
+use PHPUnit\Framework\TestCase;
+
+#[CoversClass(Disk::class)]
+class DiskTest extends TestCase
+{
+    private Disk $diskService;
+
+    #[\Override]
+    protected function setUp(): void
+    {
+        $this->diskService = Factory::getServiceBuilder()->getIMScope()->disk();
+    }
+
+    /**
+     * @throws BaseException
+     * @throws TransportException
+     */
+    public function testGetFolderId(): void
+    {
+        $userId = (int)$this->diskService->core->call('PROFILE')->getResponseData()->getResult()['ID'];
+        $chatId = (int)$this->diskService->core->call(
+            'im.chat.add',
+            [
+                'USERS' => [$userId],
+                'TYPE' => 'CHAT',
+                'TITLE' => sprintf('IM Disk Test %s', time()),
+            ]
+        )->getResponseData()->getResult()[0];
+
+        try {
+            $folderId = $this->diskService->getFolderId(dialogId: 'chat' . $chatId)->getId();
+
+            $this->assertGreaterThan(0, $folderId);
+        } finally {
+            $this->diskService->core->call('im.chat.leave', ['CHAT_ID' => $chatId]);
+        }
+    }
+}
diff --git a/tests/Unit/Services/IM/Disk/Service/DiskTest.php b/tests/Unit/Services/IM/Disk/Service/DiskTest.php
new file mode 100644
index 00000000..52990a01
--- /dev/null
+++ b/tests/Unit/Services/IM/Disk/Service/DiskTest.php
@@ -0,0 +1,57 @@
+<?php
+
+/**
+ * This file is part of the bitrix24-php-sdk package.
+ *
+ * © Maksim Mesilov <mesilov.maxim@gmail.com>
+ *
+ * For the full copyright and license information, please view the MIT-LICENSE.txt
+ * file that was distributed with this source code.
+ */
+
+declare(strict_types=1);
+
+namespace Bitrix24\SDK\Tests\Unit\Services\IM\Disk\Service;
+
+use Bitrix24\SDK\Core\Contracts\ApiVersion;
+use Bitrix24\SDK\Core\Contracts\CoreInterface;
+use Bitrix24\SDK\Core\Response\Response;
+use Bitrix24\SDK\Core\Response\DTO\Pagination;
+use Bitrix24\SDK\Core\Response\DTO\ResponseData;
+use Bitrix24\SDK\Core\Response\DTO\Time;
+use Bitrix24\SDK\Services\IM\Disk\Result\FolderIdResult;
+use Bitrix24\SDK\Services\IM\Disk\Service\Disk;
+use PHPUnit\Framework\Attributes\CoversClass;
+use PHPUnit\Framework\TestCase;
+use Psr\Log\NullLogger;
+
+#[CoversClass(Disk::class)]
+final class DiskTest extends TestCase
+{
+    public function testGetFolderIdMapsChatIdAndDialogId(): void
+    {
+        $response = $this->createStub(Response::class);
+        $response
+            ->method('getResponseData')
+            ->willReturn(new ResponseData(['ID' => 5153], Time::initWithZeroValues(), new Pagination()));
+
+        $core = $this->createMock(CoreInterface::class);
+        $core
+            ->expects($this->once())
+            ->method('call')
+            ->with(
+                'im.disk.folder.get',
+                [
+                    'CHAT_ID' => 17,
+                    'DIALOG_ID' => 'chat17',
+                ],
+                ApiVersion::v1
+            )
+            ->willReturn($response);
+
+        $result = (new Disk($core, new NullLogger()))->getFolderId(17, 'chat17');
+
+        $this->assertInstanceOf(FolderIdResult::class, $result);
+        $this->assertSame(5153, $result->getId());
+    }
+}
diff --git a/tests/Unit/Services/IM/IMServiceBuilderTest.php b/tests/Unit/Services/IM/IMServiceBuilderTest.php
index c718b769..3071379a 100644
--- a/tests/Unit/Services/IM/IMServiceBuilderTest.php
+++ b/tests/Unit/Services/IM/IMServiceBuilderTest.php
@@ -13,6 +13,7 @@
 
 namespace Bitrix24\SDK\Tests\Unit\Services\IM;
 
+use Bitrix24\SDK\Services\IM\Disk\Service\Disk;
 use Bitrix24\SDK\Services\IM\IMServiceBuilder;
 use Bitrix24\SDK\Services\IM\Placements\Placements;
 use Bitrix24\SDK\Services\ServiceBuilder;
@@ -33,6 +34,12 @@ public function testGetIMService(): void
         $this::assertSame($this->serviceBuilder->notify(), $this->serviceBuilder->notify());
     }
 
+    public function testGetDiskService(): void
+    {
+        $this->assertInstanceOf(Disk::class, $this->serviceBuilder->disk());
+        $this->assertSame($this->serviceBuilder->disk(), $this->serviceBuilder->disk());
+    }
+
     public function testGetPlacementsService(): void
     {
         $this->assertInstanceOf(Placements::class, $this->serviceBuilder->placements());