I have used https://www.arqbackup.com https://www.arqbackup.com (commercial, Mac and Win only) with local encryption for many years. It supports tons of local,

I have used https://www.arqbackup.com https://www.arqbackup.com (commercial, Mac and Win only) with local encryption for many years. It supports tons of local, network, and cloud storage endpoints. They do have a FLOSS restore utilities at https://arqbackup.github.io https://arqbackup.github.io should the app ever die. IDK if they'll ever support Linux on the backup side, but it's the bee's knees IMO.