Backblaze Computer Backup

Backblaze Computer Backup is a cloud backup service for Windows PCs and Macs that runs in the background and copies all user files, including those on attached external drives, with no cap on data volume. Files are encrypted before upload, with an optional private key, and earlier versions are kept, with longer version history available. Restores work through the web, a restore app, iOS and Android apps or a USB drive sent by mail, and a business edition adds central administration, mass deployment and SSO.