Q: My Xbox 360 broke and i want to know if i take my old Xbox 360's hard drive and put it onto another Xbox 360 will it still have all the memory i had on it and will it work on the new Xbox 360?
A: You only need to ask a question once. Yes you will keep all your data and savegames. However, if you bought Marketplace content, you have to be logged into Live with the gamertag that bought these downloads, or it will be a demo version again.