# init(persistentStoreCoordinator:configurationName:at:options:) Creates an atomic store at the specified location. ``` init(persistentStoreCoordinator coordinator: NSPersistentStoreCoordinator?, configurationName: String?, at url: URL, options: [AnyHashable : Any]? = nil) ``` ## Parameters `coordinator` The persistent store coordinator. `configurationName` The name of the store’s configuration in the managed object model. `url` The URL of the store to load. This value can’t be `nil`. `options` A dictionary that contains the store’s options. For possible values, see [Store options](/documentation/CoreData/store-options). ## Discussion Typically, you don’t invoke this method yourself; instead, the persistent store coordinator invokes the method when it creates a new store or adds an existing one. In your implementation, check whether a file exists at `url`. If it doesn’t exist, create a zero-length file at `url` so that the file exists before the coordinator calls the store’s [`load()`](/documentation/CoreData/NSAtomicStore/load()) method. A zero-length file indicates to the system that it should create a new store at that location. If the coordinator removes the store without first calling [`save()`](/documentation/CoreData/NSAtomicStore/save()), delete the zero-length file. It’s your responsibility to load the store’s metadata during initialization and set it using the [`setMetadata(_:forPersistentStoreAt:)`](/documentation/CoreData/NSPersistentStore/setMetadata(_:forPersistentStoreAt:)) method. > Important: > If you override this method, you must invoke the superclass implementation to ensure that Core Data correctly initializes the store. --- 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)