We need to be sure which Rockchip you have, Rk2608 or Rk2706.
RK2608 you can't back up, RK2706 you CAN back up.
If it's a RK2706 you should be able to make a backup by coping rkusb.tag over to the player and doing a reboot.
look here:-
http://www.mympxplayer.org/firmware-...s-vt10856.html
Please go into the player's setting menu and post the firmware version number.
Don't try to do an "Upgrade" until you have done a backup, you risk killing your player!