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Backup & Restore

Because Readium stores its data locally on the device, backups are recommended before reinstalling the app or moving to another device.

What you can do in Settings​

  • share the database file
  • save a backup to Downloads on Android
  • restore from a .readium file
  • change language
  • change theme

Exporting a backup​

  1. Open Settings.
  2. Choose a backup or export action.
  3. Share or save the generated file.
  4. Keep it somewhere safe outside the device if possible.

On Android, the app can also show a separate action to save the backup directly to the Downloads folder.

Restoring data​

  1. Open the restore action in Settings.
  2. Choose a .readium file.
  3. Confirm the warning dialog.
  4. After restore finishes, follow the restart prompt.

Because restore replaces the current local data flow, making one more fresh backup before restoring is the safer choice.

Important notes​

  • The restore file must use the .readium extension.
  • The app needs to restart after restore.
  • Existing data may be overwritten.
  • Regular backups are recommended for long-term use.