I have no affiliation with the service but I’ve been running Filen.io these past 2 years ever since switching away from my own Nextcloud instance. It’s E2EE and been running really smoothly. Also cheap and sometimes they offer lifetime packages when their algorithm decides that they can do so (which I think is a good thing in order to not have it unsustainable for them).

My only complaint is that the Android app doesn’t work half of the time, meaning you’d have to close it and re-open it 2-3 times to get it working. Otherwise it’ll get stuck on the main loading screen. Seems to be a network issue with the app that’s been posted on Github, but that hasn’t been solved for a long time now… Not a dealbreaker for me though.