Firmware is "9.1.50"...Is this a modified firmware
 

Full info from firware version of 2GB mp3 player (nano clone) purchased from Ebay:

MP3 Player
TJD_1302_02
2007-01-26
9.1.50
2005-01-09

I can't find any info relating to this firmware on this website. When I try and back up the mp3 player, I get an "unrecognized" firmware message.

connect to device 'F:\'...
init device...
set device to f-mode...
get info from device...
ic version = 0x0000
storage info = 0x0602, 0x0001, 0x0000, 0x0000
device = 'LISONG MP3 Player'
manufacturer = 'Wilson Co. Ltd.'
bootflash type = 'F285'
brom version = 3.0.80
firmware version = 9.1.50
read boot record...
detect firmware size...
error: The system cannot read from the specified device.
disconnect from device...
Press any key to continue . . .

Firmwares higher than 9.0.47 can't be backed up yet, period.