# resumeSyncForUbiquitousItem(at:with:completionHandler:) Asynchronously resumes the sync on a paused item using the given resume behavior. ``` func resumeSyncForUbiquitousItem(at url: URL, with behavior: NSFileManagerResumeSyncBehavior, completionHandler: @escaping @Sendable ((any Error)?) -> Void) ``` ## Parameters `url` The URL of the item for which to resume sync. `behavior` A [`NSFileManagerResumeSyncBehavior`](/documentation/Foundation/NSFileManagerResumeSyncBehavior) value that tells the file manager how to handle conflicts between local and remote versions of files. `completionHandler` A closure or block that the framework calls when the resume action completes. It receives a single [`NSError`](/documentation/Foundation/NSError) parameter to indicate an error that prevented the resume action; the value is `nil` if the resume succeeded. In Swift, you can omit the completion handler and catch the thrown error instead. ## Discussion Always call this method when your app closes an item to allow the file provider to sync local changes back to the server. In most situations, the [`NSFileManagerResumeSyncBehavior.preserveLocalChanges`](/documentation/Foundation/NSFileManagerResumeSyncBehavior/preserveLocalChanges) behavior is the best choice to avoid any risk of data loss. The resume call fails with [`featureUnsupported`](/documentation/Foundation/CocoaError/featureUnsupported) if `url` isn’t currently paused. If the device isn’t connected to the network, the call may fail with [`NSFileWriteUnknownError`](/documentation/Foundation/NSFileWriteUnknownError-c.enum.case), with the underlying error of . --- 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)