After formating the HDD in ext2/ext3, you can upgrade the firmware with new and enhanced features for NMT player HDD-3503; Unzip the rar file, put the upzipped file in root of USB drive or internal HDD, remember under the root. And click the index.htm.

File name:081023FW-update-bin.rar(index.htm,50-17-081023-15-KBR-405-000.bin)