I am a noob i dont really know anything about JTAG/RGGH ! i bought this xbox 360 from local market with 500 gb hard disk and this version : Current Dashboard: 2.0.16203.0 the seller told me that its JTAG ! my first question is how to find it weather its a JTAG or RGH ? it also have xex menu 1.1 and 1.2 both installed in games section ! after loading flash 360 to usb i tried to back up the NAND This is how it the LOG looks like : ********* * Looking for simpleflasher.cmd for automatic features... game:\simpleflasher.cmd NOT Found! * Entering Manual mode! Press X if you want to dump your nand with Rawdump4G v1 If you press anything else the application will close... Simple 360 NAND Flasher by Swizzy v1.3 (BETA) * Detecting NAND Type... * Detected MMC NAND device! * Entering MMC/Corona v2 [4GB] Mode... * Attempting to grab CPUKey... * CPUKey sucessfully saved to: game:\cpukey.txt ============= Console information: ============= Current Dashboard: 2.0.16203.0 Your CPUKey is: ABCDEF12345 ================================================ * Looking for simpleflasher.cmd for automatic features... game:\simpleflasher.cmd NOT Found! * Entering Manual mode! Press X if you want to dump your nand with Rawdump4G v1 If you press anything else the application will close... * rawdump4g v1 started (by Swizzy) Getting NAND Size... * Size: 3000000 (48.00 MB) game:\flashdmp.bin opened OK, attempting to read 0x3000000 bytes (48.00 MB) from flash... Done! successfully dumped 0x3000000 bytes to game:\flashdmp.bin Completed after 36.00 seconds Press any button to exit! ******************************************************** i just need to know is it is safe to upgrade my system to 167167 by following above process ! i highly active member and developer at XDA ! i hope i ll definately get a positive response from this community too. can any one guide me in more simple manner ! Thanks and regards ! waiting for reply !