Offline Backup Files

First public beta of Offline Backup: a Windows tray app that copies the folders you choose onto USB drives you keep unplugged, so ransomware, a failed disk or a mistake on the PC can't reach them.

Download and install

1. Download OfflineBackup-0.9.0-win64.zip below and unzip it to a folder you can write to (for example Documents\OfflineBackup).
2. Start OfflineBackup.exe - it sits in the tray. Windows may say the program is unknown (it is not code-signed): More info > Run anyway.
3. Name a USB drive OFFLINE-A in File Explorer, plug it in, set it up under Drives..., then Start copy.

Needs Windows 10 or 11, 64-bit. The zip contains a short how-to (README.txt).

What's in 0.9.0

• Each drive knows what it is for: its own folder list, description and history are kept on the drive.
• A preview before every copy (files to add, update, move, delete) - nothing changes until you click Copy.
• Moved and renamed files are moved on the drive instead of copied again.
• Old versions of changed and deleted files are kept in _versions on the drive, and pruned after a number of days or when the drive gets full.
• CRC32 and MD5 of every copied file are kept on the drive, plus an ExactFile-style .md5 per folder. Verify drive and Check MD5... read everything back and check it.
• A safety check asks first when an unusually large part of a folder would change or be deleted.

This is a beta: it has been tested well, but on few PCs. Keep more than one backup. MIT license.

SHA-256 of the zip: caa232d18ea1b8cb5b2ec02cb527f09e28332d197ea73adbaf13d90c112e65b3