Chosen Solution

I have a 30gb iPod and I was wondering if I can swap on an 80gb rear casing so that I can use a larger hard drive and the battery of the 80gb model.

Basically you need this stuff: *60/80 gb rear panel *60/80 gb headphone jack (it’s about 1/4" longer to reach around the thick hard drive) *60/80 gb battery (longer to reach around HD) *60/80 gb rubber bumpers (taller to protect logic board in thicker casing check this thread for further reference.

Or try actually modding your ipod! check out https://www.amazon.ca/Micro-SATA-Cables-

Yes… you could theoreticially, just remember the iPod may not function as well with the hard drive that it was not designed to carry. This is all I know on this topic so far, so if I were you, I would do a lot of research.