I really struggle with this every year.... I just can't figure out the best solution so far I keep using Tresorit but I am more then open to switch.
I need security, privacy, simplicity, stability.
The above suggestion with Cryptomator is something I have tried in the paste, but I didn't like to fact that all my data is stored encrypted on a local vault, it is not like Tresorit that the data is encrypted on the fly when uploaded to the cloud. Somehow it worried me, and I don't have enough resource to keep the data unencrypted locally as well.
Also using Cyrptomator with Google would be insane for me, because I would still need to login to Google that is really the last thing I want to do.
Without going in too much details, I do want to add, I have tested with, sync.com, dropbox, icedrive, filen.io, protondrive, synology nas, nextcloud and others but never really found a sweet spot.
I would like to see suggestions and opinions from other people.