# importResources(from:importRequest:progress:) Tells the migration extension to begin importing transportable resources into the app extension. ``` final func importResources(from extractedResourceURL: URL, importRequest: ResourcesImportRequest? = nil, progress: Progress? = nil) async throws ``` ## Parameters `extractedResourceURL` A file URL pointing to a directory that contains the resources to import. `importRequest` An optional migration request instance to pass to the app extension’s import method. If this value is `nil`, the framework uses a default request. This value defaults to `nil`. `progress` An optional object the extension uses to report its progress back to the unit test. This value defaults to `nil`. ## Discussion Clean your app state before starting an import test, since the app extension runs on a clean app state. In particular, remove any files you previously wrote to the app container and ensure it’s empty. This simulates how the extension normally runs during a migration. --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)