Hacking jtag - which internal hdd?

[Gagarin]

My jtag 320 gb is almost full and really slow (few seconds to load fsd game cover)
I want to change it for 1.5 - 2gb but I have a few questions:
What particular model fits and is confirmed to be optimal for jtag?
Is there any other way (besides fttp and cable) to transfer all content from one hdd to another? I mean, taking image of hdd and copy it?
Is there a program to defragment xbox hdd so it would be faster?

 

[DinohScene]

You can swap it to any sized HDD.

9.5 mm thick HDD's can fit without snipping the prongs off out of the enclosure.
I wouldn't recommend making an image of your old HDD and copying it to your new HDD.
Better transfer everything over by FTP manually.
There is currently no FATX defrag program unfortunately.