retrieved
v.v. to find and bring something back from a place where it was kept or lost. You use this when you get something back into your possession.
v. to recover or regain possession of something; to fetch and bring back. Transitive — requires a direct object representing the item being recovered.
The dog retrieved the ball from the tall grass.
After the meeting ended, she realized she had left her phone in the conference room and quickly retrieved it.
Divers successfully retrieved the flight data recorder from the wreckage, providing investigators with the critical information needed to determine the cause of the mechanical failure.
The verb is transitive and takes a direct object. Often used in technical contexts regarding data or physical objects from storage.
He retrieved back his keys.He retrieved his keys.The word 'retrieve' already contains the meaning of 'back' — adding 'back' after the verb is redundant.