The store I bought my 360 at just had the cores and hard drives left, so I bought one with the add on hard drive so, I bring it home and it works great except that it only says I have 12 gigs when I save games.

Is there something wrong or did microsoft release a hard drive with less memory than 20 gigs?
no all of the hard-drives are 12gb's just to hold system stuff, sorry about that!
Has anyone deleted everything from the hard drive to see how many gives that leaves???
i tryed and i was left with 13gb still!
Delete off all the crappy default music will properly dave you about 200 MB

Delete off all the crappy default music will properly dave you about 200 MB

lol yeh!
It's the truth though... it didn't say 20 available gigs...
Yeah but still i big con it should of said "O.. yeah about 40% of that 2GB you can't use" i'm sure they did'nt forget

I'm not quite sure what you just said!?
10 is for game saves and 10 for everything else..
I'm not quite sure what you just said!?
Basically they lied 
Sorry... I need things simplified for me!
You can delete all that no-use crap and you end up with 13GB. The extra 7 is for games that are good.
Most hard drives that you buy are marked for example at 300GB but only have 280GB useable GB. The marking on the package is basically a roundage of the space in megabytes. For example, 300,000MB would be marked as 300GB yes? Well 300, 000MB only translates into 280GB. It still seems abit much, most 20GB drives should have around 18GB space. I think the 360 takes alot of the space for system files and OS and such. But still seems like somewhat of a rip.