# contents(at:searchingInAssetPackWithID:options:) Returns the contents of an asset file at the specified relative path. ``` nonisolated func contents(at path: FilePath, searchingInAssetPackWithID assetPackID: String? = nil, options: Data.ReadingOptions = .mappedIfSafe) throws -> Data ``` ## Parameters `path` The relative path. `assetPackID` The ID of the asset pack in which to search for the file. By default, all downloaded asset packs are searched. `options` Options for how to read the file’s contents into a `Data` instance. ## Return Value The file’s contents. ## Discussion All asset packs share the same namespace, so you can treat the overall collection of downloaded asset packs as if it were a single root directory that contains all of your subdirectories and asset files, regardless of the specific asset pack in which any particular file resides. If there’s a file-path collision across multiple asset packs, then it’s undefined from which asset pack the file will be read unless you explicitly limit the search to a particular asset pack by passing a non-`nil` ID to the `assetPackID` parameter. > Throws: ``doc://com.apple.backgroundassets/documentation/BackgroundAssets/ManagedBackgroundAssetsError/fileNotFound(at:)`` when no file is found at `path`. > Throws: When the path is not relative or when some other error occurs while finding or reading the requested file. --- 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)