Backup

Trilium supports simple backup scheme where it saves copy of the document on these events:

• once a day
• once a week
• once a month
• before DB migration to newer version

So in total you'll have at most 4 backups from different points in time which should protect you from various problems. These backups are stored by default in backup directory placed in the data directory.

This is only very basic backup solution and you're encouraged to add some better backup solution - e.g. backing up the document to cloud / different computer etc.

Note that synchronization provides also some backup capabilities by its nature of distributing the data to other computers.