Have 160G hard drive installed but is partition , why am I being robbed of 21Gigs of space put in drive G: ??

I have evo x running x2 4977 FC+137G.
I have it set up to run a new large hard drive , and it partitioned it and made a G: drive where there is 21 gigs of free space , where there is nothing , I still have my C: drive and F: wich has most space and e drive . My question is this can i still put games on the g: drive ?? if so how because when i go to dvd2xbox it only allows me to copy to E: and F: drives

 

have you got the latest bios in it and a modchip that support a 160gig hdd because some chip can only support up to 137gig and some bios can only support thos aswel check around and make sure yours does

 

also maybe the f drive works like the c drive eg.
when using the c drive all the saves are put on the e drive
so maybe when you install a bigger hdd the games are installed on f drive and the saves for those games are used on g drive partition
just another suggestion but i think this may be tha case