I left the USB cable that came with my phone at the office, so i decided to try and use a generic cable that i had lying around to transfer files from my computer to my phone (with the help of a micro USB adaptor). However, when plugged up to my computer, it only charges the phone but does not give me the option to mount the SD card as it does when i use the Motorola cable. The generic cable i have came with my external hard drive, and i've been able to use it to transfer files to multiple devices with no problems. I thought all USB cables were pretty much the same, so did Motorola put something like a chip in the cable to get people to buy OEM?