yeah
No you can't.
Yes, you can.
All Xbox 360's are basically designed to use a hard drive, so an arcade version can definitely use a 20 Gig hard drive, but if you may have to recover your gamertag.
I believe that the 4 gb xbox 360 you are talking about is the new slim. There is no way to use your old hard drive with the new slim xbox. You will need to buy a transfer cable to move your saved games to the 4gb hard drive.
On the Xbox slim No On the Old Xbox 360 Yes
You can use any USB Storage Device (such as a thumb drive or an external hard drive) to store games, saves, Gamertags, or media on. But, it is better to use the Official Xbox Thumb drive or the Xbox Hard Drive as they are both designed for use with the Xbox 360.
You Can Use USB Hard-Drives But They Wont Be Able To Do The Same Features As The Official Xbox 360 Hard-Drive And You Will Only Be Able To Use 16GB Of Memory.
Yes. There is no point in buying a brand new Xbox 360 with hard drive because you will not use that hard drive. The arcade edition has no hard drive so you can use your old one. Also on the plus side, its cheaper.
Simply remove the Elite hard drive from the Xbox360 Elite and insert it into the Xbox360's.
they are all the same they just have different hard drives Xbox arcade has no hard drive so you use memory sticks Xbox 360 has a average hard drive Xbox 360 Elite has a MASSIVE hard drive that can hold videos, pictures, save files, etc except they MIGHT have come out on diffenrt dates and my ges is elite
yes you can