OK, so I was all excited and wanting more info. So I emailed their tech support, which was SUPER fast I must say. Here is what I asked:
"Hello, I am seriously interested in your RDS-634U head unit with USB port. However, I would like to know a little more about how this device works.
I would like to be able to plug in an external laptop size hard drive enclosure with at least 80 GIGs of MP3 files stored on it. Can the RDS-634U read external hard drives and catalog the MP3s properly? Also, most laptop size external hard drive enclosures are powered by the USB port and do not need external power from an A/C adapter. Will this unit be able to power an external hard drive as well?
Thank you for your time."
And this is their reply:
"Bart,
Our USB unit has power for USB 1.1 but not enough to power up 2.0 USB.
It will read up to 249 tracks on the USB/SD input. If you have more than that, the unit will not see them in your hard drive.
Thank you for choosing Boss Audio product."
Wow, I haven't felt this let down since I saw The Matrix 2 and 3.
Now I know why it is only about $100.
Bart