Samsung UE40ES7000U E-Manual page 596

the TV can display the names of up
to 1000 files in each folder.
ΠIf the number of files and folders
saved on a USB storage device is
over approximately 8000, some files
and folders may not appear and
some folders may not be unopenable.
ΠThe TV cannot play MP3 files with
DRM that have been downloaded
from a for pay site. Digital Rights
Management (DRM) is a technology