My cheap solution for large datasets is to buy a raspberry pi and external hard drive(s), setup in a friend or relatives house, and setup syncthing. One friend has a copy of my ripped discs, my parents have copies of my photos, etc. Make sure the remote instance is in read only mode.

For sensitive data I would run something else that can be a Restic target so backup data is encrypted, I currently use a cloud drive that supports WebDAV for that.