Know what gets copied.
If iCloud optimization is on, download the originals first. Apple says direct export saves the unmodified original rather than later edits, and a locked Hidden album is skipped.
Mobile fit 01 · iPhone photos
Choose how you want to use the photos after the copy. If a drive fits that goal, we will size it, check the connection, and show what to verify before deleting anything.
Your transfer plan
Reusing a drive is a valid result.
Evidence before commerce
If iCloud optimization is on, download the originals first. Apple says direct export saves the unmodified original rather than later edits, and a locked Hidden album is skipped.
USB-C can connect directly. Lightning and some hard drives need an adapter, external power, or both.
After deletion, the drive becomes the only copy unless the files also exist on another drive, computer, or cloud service.