Locked flag
The Locked flag is the Locked checkbox in a file's Get Info window, which stops it being changed or deleted. Storage Studio carries it over to the moved copy.
The Locked flag is the Locked checkbox in a file's Get Info window in Finder. A locked file can't be changed, renamed or put in the Trash until you unlock it — a simple guard against accidents.
When Storage Studio moves a folder, it carries the Locked flag over to the copy on your drive, along with the flag that hides a file in Finder. This happens once the copy has been checked.
Then, because a locked file can't be removed, Storage Studio unlocks the original — only so that it can finish the move by removing it, or replacing it with a shortcut. The copy you keep is still locked, just as the original was.
See also: What a move keeps · Verified copy