Some of you might have heard about rclone. It’s an open source app that you can use to mount pretty much any cloud storage provider that you have to your native file system. Like you would plug a USB flash drive for example.
Someone apparently brought the idea over to Android, creating an app that uses Storage Access Framework.
For those who don’t know what this means, it’s a way of accessing an app’s files through Android’s native file picker (which, in turn, is Android’s native file explorer). See this screenshot as an example. In the displayed side pane, you can see both Google Drive and OneDrive displayed. They both make use of Android’s Storage Access Framework and you can access their files right there in the file picker, without having the apps open.
If you created multiple accounts on different cloud storage providers, then this is an actual lifesaver for your phone’s storage, as it’s simply better to only have one app for them all instead of having multiple apps for all the providers.
There’s also RCX. But it doesn’t support all possible remotes through gui, however all remote types can be added by importing rclone conf file.