External drives · Choosing a drive
Does Storage Studio make my external drive bootable or install macOS on it?
Short answer: No. The fast drive is extra storage for moved apps and folders; your Mac still starts from its internal drive. Backup Drive copies Storage Studio's folder, not your whole Mac, so use Time Machine for full-Mac backups.
No. Storage Studio uses the external drive as extra storage for apps and folders you move; your Mac still starts up from its internal drive, and macOS stays there. Backup Drive copies Storage Studio's folder (your moved apps and folders plus its records), not your whole Mac, so it isn't a bootable copy either.
If you want a full backup of your Mac, use Time Machine alongside Storage Studio.