Smart Phone 4GB U-disk USB Flash Drive 1,High speed transfer 2, ... are ok High Speed Smart Phone 4GB U-disk USB Flash Drive Certificate:CE,RoHsSize:58*19*10.5MM ... mix the ordinary U disk , MicroSD card reader, mobile external storage, data transfer and other functions together. If your ... disk connect to the phone, until your phone appear USB connected, indicating that smartphones and smartphone U disk have ...