Questions about iPod and Volvo Adapter

I don’t know about the stuff at all, but to have a slightly larger music selection ready, I play with the idea of adding an iPod and the Volvo iPod adapter. I would like to ask some questions to those who know about it. I’m not interested in downloading songs from iTunes. Can I just fill the iPod with MP3s from my hard drive? Can I create the files in different folders and select them from the Volvo Radio (HU-650)? ylisten create and are these recognized by the HU-650? Does the player remember where you were when you turned off the car? Are quality losses that go beyond the MP3 format in itself to be expected by the adapter? Can the iPod handle different MP3 sampling rates? Are there any other things to consider? Would be grateful for all the information. Marcel