Comparisons & alternatives · macOS's own storage tools
Does Storage Studio replace Disk Utility?
Short answer: No. Disk Utility formats, partitions and repairs drives. Storage Studio uses a ready drive to hold the folders and apps you move to it, and doesn't erase or repair disks.
No — they do different jobs, and you'll still use Disk Utility for its own. Disk Utility is Apple's tool for erasing and formatting drives, creating partitions and volumes, and running First Aid to check and repair a disk.
Storage Studio works on top of a healthy, formatted drive. It sets up its own folder on the external drive you pick, moves folders and apps onto it, keeps track of everything it moved, and helps you eject the drive safely. It won't erase, partition or repair disks for you.
So a typical order is: format the new SSD in Disk Utility if it needs it, then choose it as your fast drive in Storage Studio. See External drives.