Portable Hard Drive

my brother was looking into getting a portable HD for the sole use of being able to take his entire Music library with him from his house to his other 3 brothers and 2 friends and add there CDs to it. are there any draw backs to this?

Except breaking the rules talking about it…

Just so i know what state of mind people are in here, what is the difference between going to a freinds house and riping is CD library to a portable HD and him handing you a copy of a new CD he bought wants you to hear?