Automatic Project Backups

Backups keep dated copies of your books in a separate folder, so no single file is ever the only copy of your work. Lacuna writes a fresh copy as you save, keeps as many as you choose, and quietly removes the oldest ones.

Turn Backups On

1. Click the cogwheel (Lacuna Settings) in the side menu on the right of the editor.
2. On the Project Settings tab, find Project Backups.
3. Click Choose Folder… and pick where backups should live. The switch stays locked until backups have somewhere to write.
4. Turn on the Save backup files switch.

The status card at the top tells you at a glance whether backups are on and working. Once they are, it shows how many copies exist, how much space they use, and when the newest one was made.

Pick the right folder

A folder on a second drive survives the death of the first one. A cloud-synced folder is the one place to avoid, because two machines can overwrite each other’s copies.

How Many, How Often

Two settings shape your backup habit:

• Keep. How many dated copies of each book to keep: 1, 2, 3, 5, 10, or 25. Once a new backup goes past this limit, the oldest one is removed. A size estimate below the setting shows roughly how much disk space your choice will use.
• Frequency. How often saving can add a new backup: Every Save, or at most once every 15 Minutes, 30 Minutes, or 60 Minutes. Saves that change nothing never add a backup, no matter the setting.

Where Backups Live

Inside your backup folder, each book gets its own subfolder. Every backup is a complete, dated project file:

Luna's Adventure 2026-08-12 14-30-05.lacuna

A backup is only counted after it has been written and verified, and the oldest copy is pruned only after the new one is safe.

Restore From a Backup

A backup is a normal Lacuna project file, so restoring is just opening one:

1. Click Open next to the backup folder in Lacuna Settings, and open your book’s subfolder.
2. Find the dated copy you want by its timestamp in the file name.
3. Open it in Lacuna with File → Open Project, and save it wherever you like.

Backups protect the past, saving protects the present

Backups are dated copies from earlier save points. For how saving itself works, including autosave and the save indicators in the header, see save your project.