Questions about the 4G models

You tell me if the 4G model is good enough for my scenario:

I'm tempted to buy a temporary 360. However I do not plan to use it at full potential. I only plan to store saved files,patches, and maybe a few arcade games if I see somethingof interest (I already have acouple in mind). I also won't be doing online gaming. At this point, would the 4G model suffice? How much space would the previously mentioned things take up?

you should be fine imo..

but i think you wont be able to play xbox games from last gen...not sure..

Sounds like it should be ok. As long as you just stay under the 4GB limit. you could also use UBS thumbdrives up to 32GB (2X 16GB) any brand should work.