Xbox360 *please help if you can*?

a friend burrow xbox 360 the game has little scratches but it was working just fine Perfectly before we let him use it for day for his xbox360 (but its Black Xbox360) then gave it back next day but when we put it on to play it says something Really strange since it was still like the same way before but the game isn't working and it said this MIXED Media Storage when we put it on xbox360 ( regular) is there Any Differences between Xbox360 (regular) to Black Xbox360 we just want to know ? (not sure if anyone else had this problem) What To Do ?