Zback is a free (for personal use) synchronization tool.

It will let you synchronize directories for routine backup, for example between hard drive and USB drive or synchronize two computers via USB drive. It can be also used as a general purpose backup utility to save changes in work directories.

Features: portable – no setup needed. Works from USB stick, does not write to the registry * copy modes: update files, refresh existing files, mirror source to target, synchronize and restore mode * filter files based on extension, size, date, subdirectories, only new or existing files * include/ exclude specific directories * preview and execute operation * save backup scripts for routine backups * keep multiple versions of backup files * simple, manual, batch or command line operation * small size (200 kB)

Zback sometimes fails to read the contents of a drive!

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