Samsung UE50ES6300U E-Manual page 559

USB extension cable, the TV may not
recognize the USB device or read the
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,
re-copy the files to the device, and
then try playing again.
ΠIf a file you deleted from the PC is