mpc freezes everytime i use usb!!!

everytime i push the button to use usb my mpc frezzes and i have to turn it off and on agian!!how do i save my beats and load??? nothing comes up when i hook it up to my computer!! it just says no photos found in device , i can slip in the flash card to my computer and it shows what ive saved but other then that it dont work!!! holla back!!

read the manual bro. the card must be in the MPC when plugged into the computer. the MPC is not functional while slaved up via USB. Your MPC isn't freezing up, just unplug the USB cable when you are finished transferring files.