Samsung UE50ES6300U E-Manual page 250

N
If there is only one photo file in the
USB, the slide show will not play.
N
If a folder name is too long, the
folder cannot be selected.
N
Each USB you use is assigned its
own folder. When using more than
one of the same types of USB, make
sure the folders assigned to each
USB have different names.
N
We recommend that you use a USB
memory stick and a multi card