I am having difficulties backing up performance files on a USB thumb drive and using them on another CP keyboard. I own a CP88 and have made multiple performances. A friend owns a rehearsal studio where he has a CP73 and is OK if I load up my customer performances on that keyboard. Will save me from transporting my keys!!!! I tried to do it this weekend and followed the instructions in the owner's manual but the file did not load up. Is there a link to any videos that you can share on the proper way to back up to USB and load on another CP keyboard? Thank you.