29 files declare their use of FileInterface in Drupal 10

claro.theme in core/themes/claro/claro.theme

Functions to support theming in the Claro theme.

ComputedFileUrlTest.php in core/modules/file/tests/src/Kernel/ComputedFileUrlTest.php

DatabaseFileUsageBackend.php in core/modules/file/src/FileUsage/DatabaseFileUsageBackend.php

EditorFileReference.php in core/modules/editor/src/Plugin/Filter/EditorFileReference.php

editor_test.module in core/modules/editor/tests/modules/editor_test.module

Helper module for the Text Editor tests.

file.module in core/modules/file/file.module

Defines a "managed_file" Form API field and a "file" field for Field module.

File.php in core/modules/file/src/Entity/File.php

File.php in core/modules/media/src/Plugin/media/Source/File.php

FileFieldTestBase.php in core/modules/file/tests/src/Functional/FileFieldTestBase.php

FileManagedAccessTest.php in core/modules/file/tests/src/Kernel/FileManagedAccessTest.php

FileManagedTestBase.php in core/modules/file/tests/src/Functional/FileManagedTestBase.php

FileManagedUnitTestBase.php in core/modules/file/tests/src/Kernel/FileManagedUnitTestBase.php

FileSelection.php in core/modules/file/src/Plugin/EntityReferenceSelection/FileSelection.php

FileTest.php in core/modules/jsonapi/tests/src/Functional/FileTest.php

FileUploadForm.php in core/modules/media_library/src/Form/FileUploadForm.php

FileUploadHandler.php in core/modules/file/src/Upload/FileUploadHandler.php

FileUploadResource.php in core/modules/file/src/Plugin/rest/resource/FileUploadResource.php

FileUploadResult.php in core/modules/file/src/Upload/FileUploadResult.php

FileUsageBase.php in core/modules/file/src/FileUsage/FileUsageBase.php

FileUsageInterface.php in core/modules/file/src/FileUsage/FileUsageInterface.php

image.module in core/modules/image/image.module

Exposes global functionality for creating image styles.

InlineBlockPrivateFilesTest.php in core/modules/layout_builder/tests/src/FunctionalJavascript/InlineBlockPrivateFilesTest.php

LoadTest.php in core/modules/file/tests/src/Kernel/LoadTest.php

locale.bulk.inc in core/modules/locale/locale.bulk.inc

Mass import-export and batch import functionality for Gettext .po files.

SpaceUsedTest.php in core/modules/file/tests/src/Kernel/SpaceUsedTest.php

Status.php in core/modules/file/src/Plugin/views/filter/Status.php

TemporaryJsonapiFileFieldUploader.php in core/modules/jsonapi/src/Controller/TemporaryJsonapiFileFieldUploader.php

TestFileUsage.php in core/modules/system/tests/modules/service_provider_test/src/TestFileUsage.php

UrlPlainFormatter.php in core/modules/file/src/Plugin/Field/FieldFormatter/UrlPlainFormatter.php