OM System CB-USB13 USB Type-C Cable

A generic USB-C lead will move files, but the OM-1 series negotiates 9V charging and expects a cable rated for it. The CB-USB13 is the part OM System specifies, so charging runs at the rate the camera is designed for rather than falling back to a trickle.

It also carries data for card readout and tethered shooting, and the length is chosen to be workable on a desk without coiling. Worth buying as a spare if the camera lives in a bag where the supplied cable gets left behind.