Best/easiest way to get iTunes to PS Audio Bridge

I have a PS Audio DAC Mark II with a bridge coming in the next few days. What is the best/easiest way to get my iTunes data to the PS Audio? I have an Apple Laptop that I can use just for this purpose, but I was hoping there was a way to buy just a hard drive....or something that can be used as a server other than the actual laptop. Any suggestions?

Thank you.

jeff