Use the 4" Camera USB Port Protector from Kupo to relieve stress on your camera's USB or other type of cable. This guy line-type of tether features a quick release buckle, a hook-and-loop lasso that goes around your cable, and a fine lanyard that secures to a stationary point on your camera.
Protects Cable Port
This tether both protects your USB or other camera port and prevents accidental disconnects while shooting