Free backup tools for Windows: Iperius Backup Free, ZBack, Areca Backup and Genie Timeline for continuous file protection.
Continuous file backup for Windows with a timeline of earlier file versions. The Free edition has been discontinued: Genie9 lists Genie Timeline as a legacy product, now commercial with paid Home, Pro and Server editions and a trial.
Free edition of Iperius Backup for Windows and Windows Server. It schedules full, incremental and differential file backups to NAS, USB/RDX drives and network shares, with zip compression and email alerts. No service mode, VSS, cloud or image backup.
Free, portable folder backup and sync tool for Windows: update, refresh, mirror, synchronise and dated backup modes, filters, preview and saved batch jobs for USB and LAN copies. Dormant: the last version, 2.90.0.a, dates from 2020.
Free, open-source (GPL-2.0) file backup for Windows and Linux. Full, incremental, differential and delta backups to disks, NAS shares and FTP/SFTP, with Zip64 compression, AES encryption and as-of-date restore. Current releases come from the maintained bugtamer fork.
