3.4. Application data & logging
Keywords: fwbackups, user guide, help, documentation, configuration

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## ⁠3.4. Application data & logging

fwbackups stores all of its logs and configuration in the `~/.fwbackups` folder on Linux, or `%APPDATA%\fwbackups` on Windows. The GUI adminsitrator's application preferences are written to a file named `fwbackups-prefs.conf`.
The fwbackups log file is written to `fwbackups-userlog.txt` in the application data folder; it is not rotated automatically. Whenever the backup administrator is run or a backup/restore operation is started, the fwbackups log file will be appended to.
Backup sets are .ini-style files stored in the `Sets` subfolder of the application data, and must have a `.conf` extension in order to be read by fwbackups. The files are portable between different machines and platforms, and will be automatically upgraded on first read if they are from a prior fwbackups version.

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