Which mobile OS would that be?
The big reason I stopped being excited about cloud storage is that on mobile, from what I can tell, none of the major providers care about "folder that syncs" experience. You only get an app that lets you view remote storage. The only proper "folder that syncs" I had working on my phone so far was provided via Syncthing, but maintaining that turned out to be more effort than my tiny attention span can afford these days.