In article <firstname.lastname@example.org>, Robert Peirce
> I have my iTunes database as identical instances in PA and VA. A friend
> suggested it might be easier to put it on a large, portable external
> drive and cart it back and forth, using the PA and VA dbs for occasional
> backup instead of trying to keep them both synced.
> The more I thought about it the more sense it made. However, every
> drive I looked at has an extra power supply I would also have to take
> with me, either that or have multiple supplies. I know some smaller
> drives are powered off the USB bus but I don't know of any this large.
> Are there any?
Sizes are increasing all the time (and decreasing in price or the same
price for bigger capacity). Such a drive will be expensive.
The latest issue of the UK magazine MacFormat August 2016 I've just got
has a review of these two USB-powered (although both USB-C, so you may
need an adaptor back to USB):
- LaCie Porsche Design Mobile Drive 4TB
Not quite the right capacity, but there may be bigger
capacity versions already / soon. Comes with USB-A adaptor.
- Seagate Innov8 8TB
You could probably build one yourself using a bare drive and an
external USB enclosure. You may also need a "Y-cable" to use two USB
ports to get enough power.