A duplicate kept only to make someone's own work easier. The authoritative record drives retention; a convenience copy should never become the only copy.
A convenience copy exists only to make your own work easier; retention is driven by the authoritative record, not the duplicate. The risks are that a convenience copy quietly becomes the only copy, or that sensitive information is duplicated without control.
IAR turns terms like this into working practice: assets classified against your disposal authority, stewarded by position, and ready to evidence.