Hi everyone. I have a strange issue with backwards compatibilty on my stock Xbox 360, I thought I make a thread about it since I have not found any information about it and if anyone else have had this issue and maybe has an working solution for it? I have an original console with an 250GB drive, I am the second owner of it and I made an RGH of it for a while, until I came across another console which became RGH'd and reverted this one (my first ever owned slim) back to original state. During it's RGH state I used xbox1 partitioner and hacked compat pack, worked perfectly. Once reverted back to stock I scratched my head many days why I could not play OG xbox games on it, but my old phat console could play them without any problem. I found xplorer360 extreme 2 and the partition2.bin solution and voilá, it worked as it should again after that,, but, here is my issue of today. I have an oem/stock/original, whatever it's prefered term is, 320GB HDD, I know it is an oem HDD since it comes from another original console, and I have another oem 250GB HDD which is mounted in an Halo Reach console I have, since it came out of it's original box. I would like to upgrade the 250GB in my console with 320GB, just to have room for a couple of extra installed games and content and the Halo Reach console is soon on it's way to a new owner, But!,, the backwards compatibility of OG xbox games is not working as it should with this 320GB or the other 250GB disk in the Halo Reach console, neither when mounted in my black stock console or in the Halo Reach console. . This is the strange issue,,when I have my original 250GB in my console, it works super after the partition2 restore procedure, I tried Halo, Conker Live & Reloade, Counter Strike, Forza Motorsports etc, no problems,, but with the 320GB and the other 250GB disks only Halo works. If I put the Halo disc in and press Play Game, the white background with the OG xbox logo appears and the game starts, but with any other game the white background with logo appears for a brief moment, just a second, then it turns black and I am returned to the dashboard again. No error messages, no "This game could not start, try to download it again" popup, it just returns to dashboard. I have tried the following: Xplorer360 Extr2 restore partition2 procedure wich worked on my original 250GB disk after RGH. Made an backup of partition 2 from my working HDD and restored with that through Xplorer360 Extr2 and tried with and without a copy of the Compatability folder from partiton 3 on my working 250GB disk. Put them in my RGH, done the Xbox1 compat fix procedure to erase to original Partition 2 space first and then restored them with Xplorer360 Extr2 with both Partition2.bin and my own partition 2 backup. Format every partition on the disks with FATXplorer, put them in my stock console, downloaded the new Required Update, which only giver me the "This game could not start" error message. Formatted them in my stock console, cleaned Cache. Been through all the above steps again in every possible order, still,, I have the same issue with the 320GB and 250GB Halo Reach disks, they can just start Halo, every other game just gives me the white background wit OG logo for a second, turns black and returns me to dashboard. Have anyone else been having the same issue, and in that case how is it possible to resolve this strange problem?