I am using k70 demo board ,3.8 MQX and 10.2 Codewarrior .On demo board USB port is working properly in "4 GB" pen drive.But i add upto 4 GB drive it not working ,what i do for this problem ,the error message coming on hyperterminal is (i am using 32 GB hard drive).
Error while opening partition (UNKNOWN ERROR !!!)
Device removed, starting device cleanup
--->Closing USB MFS