Super many thanks. I mentioned the wrong model before, i was actually referring to the iPod video (5G).    Then i think i will go for the Dual SD Adapter with 256GB or 192GB.   Thanks!

Could you please tell me if this works? Or are you going to use Rockbox? I read quite often that the iPod classic 30GB has a 128GB limit.   So when you can have 2x128GB, then i think i will also go for the Dual SD Adapter :)