External drives · Upgrading, transferring and backing up the drive
How often should I run Backup Drive?
Short answer: Backup Drive makes a one-off, point-in-time copy and doesn't update itself. Re-run it after big changes; for automatic, scheduled, versioned backups use Data Backup.
Backup Drive is a one-off, point-in-time copy — it doesn't update itself afterwards. Run it again whenever enough has changed on your fast drive that you'd want the newer state, for example after moving big folders or apps, or before travelling with the drive.
For automatic, scheduled and versioned backups of particular folders, use Data Backup, which keeps restorable versions over time. See Data Backup.