[Home](./index.md) > [@firebase/storage](./storage.md) > [ListResult](./storage.listresult.md) > [prefixes](./storage.listresult.prefixes.md) ## ListResult.prefixes property References to prefixes (sub-folders). You can call list() on them to get its contents. Folders are implicit based on '/' in the object paths. For example, if a bucket has two objects '/a/b/1' and '/a/b/2', list('/a') will return '/a/b' as a prefix. Signature: ```typescript prefixes: StorageReference[]; ```