Firebird comes with its own utility for backing up and restoring your databases. Its name is gbak and it can be found in the bin subdirectory of your Firebird installation. Firebird databases can be backed up whilst users are connected to the system and going about their normal work. The backup will be taken from a snapshot of the database state at the time the backup began.

Regular backups and occasional restores using gbak should be a scheduled part of your database management activity.