Chosen Solution

Are these 2 compatible or is the 160gb thick HDD suitable only for the gen 6 classic?

sydney the 6th generation (Classic) and 5.5/5th gen (Video) hard drives are not cross compatible.

Sydney - I resurrected my old iPod with this SSD upgrade kit: Tarkan iFlash-Dual - Adapter for iPod. I think you’ll find it a better solution.