1. Download upgrade-last.tar file from server
   • sMS-200
   • sMS-1000SQ
2. Copy upgrade-last.tar to Eunhasu samba directory \\eunhasu\mw\data\music
3. Eunhasu page load like http://eunhasu/upgrade.php?upgrade_server=eunhasu/music&force=1
   1. upgrade_server={EUNHASU_IP}/music is possible

1. Format USB to FAT32
2. Change USB label to SOTMDEBUG and it must upper case
3. Download upgrade-last.tar file from server
   • sMS-200
   • sMS-1000SQ
4. Copy downloaded upgrade-last.tar to the USB root directory
5. Make file named run_debug.txt in the USB
6. run_debug.txt file must contain following strings

upgrade force

Refer Here