Nsh

I've seen another comment about this but I think you should try to check and repair the disk with fsck

For me Mega is really great, 50gb for free and end to end encrypted

Yes, proton is pretty awesome for privacy and security. And it's also because the Swiss laws has made it possible.

I haven't got this kind of issue with nextcloud, I'm pretty sure you can reset your password using occ via cli

Switzerland