Samsung 8000 Series User Manual page 438

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 approximately
over 8000, the files and folders may not
appear and some folders may not be
opened.
ΠThe TV cannot play MP3 files with DRM
that have been downloaded from a for
pay site. Digital Rights Management
(DRM) is a technology that supports the
creation, distribution, and management
of digital content in an integrated and
comprehensive way, including protecting
the rights and interests of content