Hello, I have a 4th generation iPod to repair. I don't want to buy a new one, because I have the tools needed and a 1.8'' HDD on ebay is quite cheap. The thing is, I only find 80GB and above, while the original HDD of the device is only 20GB. Can I go ahead and buy the 80GB one and will it work, or do I really need to buy an equal drive? iFixit makes me doubt it... PS: I used the search function, but couldn't find a post answering this.