Has anyone found any USB 3.0 Flash Drives that are thin enough to fit in the USB 2.0 ports on an other MacBook (like a 2012 Thunderbolt MacBook)? All the 3.0 grade flash drives that I've found so far seem to be over the 19mm port-to-port width of the older MacBooks (Many seem to be in the 21-23mm range) - thus if you plug the drive in, there might not be room in the neighboring ports for other USB cables.