This short cable has enabled me to access all my USB flash drives. Due to the extremely tight tolerances of the Apple devices, some USB flash drives and MP3 players have not come into contact to the USB connectors located on the MacBook. The same equipment not functioned initially on Delock cable also, if you shortened BUT the plastic collar on the socket side using a sharp knife to about 2 mm, then everything fits. That may seem strange to some readers, but makes more sense than the noble aluminum case to edit the MacBook with the file or throwing functioning gigabyte capacities in the trash. :-)