MomentBackup

MomentBackup keeps a browsable, encrypted history of your files on storage you already own: an external drive, a NAS, Google Drive, or an S3-compatible bucket. Encryption keys never leave your computer. Browse any past version of a file and restore it; on Windows you can also keep a whole-computer image and restore it to a replacement drive after hardware failure. Backups are verified, and restores always work whether or not a license is active. Buy once ($49 for one computer) with no subscription and no hosted-storage bill. A 7-day trial needs a free account (email address only, no card).