Hello.
When you utilize a USB drive in your embroidery machine, the designs must be opened in the corresponding section. Look for the USB Icon on your embroidery machine. Press that button and designs stored on the USB drive should appear. Be sure your USB drive is correctly installed and turn on machine. If a card is utilized, then you must look for the Card Icon, etc.
Speaking from personal experience....two out of three SanDisk USB drives (purchased in WalMart) have given me problems. I have since switched over to Staples own USB drive and all is well. Like I said, just me. Fluke thing.
Hope this helps.
Joan