Described are external storage devices including a substrate, a controller electrically coupled to the substrate, at least one memory die stack electrically coupled to the substrate, a plurality of connection fingers electrically coupled to the substrate, and a mounting bar electrically coupled to the substrate. The mounting bar may include a plurality of springs. In other examples, the external storage device may include a substrate, a controller electrically coupled to the substrate, at least one memory die stack electrically coupled to the substrate, a plurality of connection fingers electrically coupled to the substrate, and a contact bar electrically coupled to the substrate. The contact bar may include a plurality of extensions. One or more memory die stacks may be coupled to one or more surfaces of the substrate and may include a plurality of dies in each memory die stack.