I use Mega.
Even the free version offers 50GB, and the PC version has version control.
The official mobile app (android) requires a subscription for sync with version control (?), but there are free alternatives like autosync or foldersync. Though they don’t offer version control.
I think some additional info might be useful for others to offer more suggestions.
Like what devices you use (Windows/mac/ios/etc.) and whether you want realtime collaboration or just be able to continue your work on a different device.