Answer: peripheral

AnswerCrossword Clue
PERIPHERALTo the side
peripheralOf, relating to, or situated on the edge or periphery of something
peripheralOf secondary or minor importance; marginal
peripheralat the edge / a device connected to a computer to provide communication (as input and output) or auxiliary functions (as additional storage)
peripheralNear the surface of the body, with special reference to the circulation and nervous system
peripheral(of a device) Able to be attached to and used with a computer, although not an integral part of it