https://github.com/chenxiaolong/RSAF/blob/v3.49/CHANGELOG.md

RSAF is an Android document provider for the wonderful rclone. It allows any app that supports Android's Storage Access Framework (SAF) to access remote files via rclone's backends. RSAF is not itself a file manager, but any file manager supporting SAF, including the one built into Android (Settings -> Storage -> Documents), can make use of it. Features Supports Android 9 and newer Supports all rclone remote backends, including those that require OAuth 2.0 Supports importing and exporting the rclone configuration file Supports random reads Supports server-side copy/move for rclone backends implementing this feature Supports client applications that request access to a file descriptor Supports client applications that open entire directories with ACTION_OPEN_DOCUMENT_TREE Supports pretending to be local storage for apps that block remote SAF roots No required permissions besides network access