This disclosure includes a portable data storage device comprising a mass data storage device, a cartridge housing enclosing a mass data storage device, and a flexible interconnect. The flexible interconnect includes an external electrical connector mechanically coupled to the cartridge, an internal electrical connector mechanically and electrically coupled to a data port of the mass data storage device, and a set of flexible electrical conductors electrically coupling the external electrical connector to the internal electrical connector. The flexible electrical conductors are routed within the cartridge such that no portion of the set of flexible electrical conductors lies in a volume defined by the space between the external electrical connector and the internal electrical connector.