A retaining clip to be used with a storage device in a host computer system, wherein the retaining clip is configured to secure an interposer serving as electrical and logic state interface between the device and the structure of the host system. The retaining clip engages with the device through a peg inserted into a mounting hole for the device and secures the interposer by holding it against the device's data or power connector by a tab extending over the interposer and exerting pressure against it towards the device. Additional fins extending from the body of the clip in substantially opposite direction from the tab secure the tab against the enclosure of the host computer system.