User Manual
Files
Apps like Dropbox, Google Drive, and Microsoft OneDrive can extend their services to be available in other apps through the iOS Files app. On older devices, this was known as storage providers. You can access all your files found on the services you use through Files.
Selecting "Files" from the Add Songs menu opens the Files iOS interface. By default, this may choose the Recents tab at the bottom showing you recent files. Tap on the Browse tab to view all of your files. Select the storage location to browse on the left, or view content by tags.
Once you select a location, the folders and files contained in that location are displayed on the right. You can search or browse for files. Files that are supported for import are available for selection. If you wish to select more than one file, tap on the Select button in the upper-right corner and then select the files you want to import.
The Files interface is managed by iOS and storage providers. If you need support with this interface, please contact Apple or the storage provider for assistance.