The drive was unplugged during a move

If your drive comes unplugged in the middle of a move, nothing is lost. The original is still on your Mac — Storage Studio only removes it after the copy has finished and been checked — and the move is set aside as Waiting for drive. Plug the same drive back in and the move picks up by itself, skipping what was already copied.

What state things are in

• The original is untouched. A move removes the original only as its very last step, after copying and checking.
• The move is waiting, not failed. In the Moves list it shows Waiting for drive in orange. A red line underneath may also say "The drive became unavailable while moving “…”. Your original is safe — reconnect the drive and try again." For a waiting move you don't need to start it again — reconnecting is enough.
• Moved apps and folders are out of reach until the drive is back, because they live on it. See When your drive is disconnected.
• The Home screen says "Your external drive isn't connected."

%% caption: What happens when the drive is unplugged during a move
flowchart TD
  A[Drive unplugged during a move] --> B[Move stops and waits for the drive]
  B --> C[Original stays on your Mac]
  C --> D{Same drive plugged back in?}
  D -->|Yes| E[Move resumes and copies what's left]
  E --> F[Copy is checked, then the original is removed]
  D -->|A different drive| G[Move stops - original still untouched]
  G --> H[Reconnect the right drive and move again]

How to fix it

1. Plug the same drive back in and wait for it to appear in Finder. Waiting moves resume on their own; this also happens when Storage Studio next starts.
2. Watch the Moves list in Data Parking. The move goes back to Copying, then through its checks, then Completed.
3. If it shows Failed instead, a different drive may be connected — Storage Studio won't finish a move onto a drive it didn't start with. Connect the original drive, or start the move again to the drive you want. See A folder move failed or was cancelled.
4. If the drive doesn't appear, try Remount Drive in the More menu, or another cable or port.

To take the drive away on purpose, use Eject Drive… from the More menu first — see Ejecting your drive safely.

Transfers and backups

Data Transfers jobs that need the drive show Waiting for drive; once it's back, select the job and use Check drive. A backup to the drive that can't reach it waits quietly and runs again once the drive is connected — see A backup didn't run.

See also: Moving folders safely · The Moves log · How copies are checked · Something's not working: start here