Samsung PN51E6500EFXZA - Manual (Page 501)

not support the file type, the Not
Supported File Format. message
appears.
ΠIf the files are sorted by Folder view ,
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 be unopenable.