I have a folder with 4000 Songs MP3, 400 CD's, in a iMac folder and on a USB drive that I use in my car.

It is just way too much so I wanted to just make a smaller USB of selected songs based on what I feel like listening to without having to browse that entire USB. This may be a stupid question, but what is the best way to create smaller USB's. I would probably just build them from the iMac Folder of titles.

I can then just erase and rebuild based on what songs I want to listen to.

Any suggestions on best way to do this.