Samsung UN46ES7500F E-Manual page 448

files on the device.
ΠIf a USB device you connect to the
TV is not recognized, the files on the
device are corrupted, or a file in the
list is not played, connect the USB
device to a PC, format the device
and check the connection.
ΠIf a file you deleted from the PC is
still found when you run Smart Hub,
use the "Empty the Recycle Bin"
function on the PC to permanently