which external hard disc for music storage?

Do not get a Buffalo. You need to get something that is more geared towards corporate use. I suggest an Infrant ReadyNas drive with the more robust Seagate pro drives. You will be more than happy you spent the extra money knowing your data is safe and backed up.

I'm just taging this. Good Thread!

I'm happy using a NAS drive which gets backed up about every two months. Complete image of drive, no compression in my backup.

I have a Buffalo Terastation Pro. Fan noise is too loud for me even though it's in a separate room. The fan is always running- even in winter (Texas winters). Will move to an Infrant NV+ when the next 'new model' comes out from them.

All NASs are slow but only for that first big upload of info. Use a 1 gig network connection and it will take a few hours and be over that one time it's necessary to do.

Can't imagine storing my music on a laptop hard drive. That seems risky.

Can I use this device?

http://atechfabrication.com/products/mass_storage.htm

As an audiophile, I like to spend as much as possible, with a substantial percentage of funds allocated to the chassis alone.

What kind of drives should I put in this? Stackable?

Please advise.

Cwlondon; the short answer is "yes," you can use it IF you have the right computer setup for it. But I would say it is extreme overkill and not the best implementation for audio this purpose. The box looks like it's made more for use with non-linear editing hardware where a local, fast connection to a HD array is necessary. Much cheaper and more flexible options are available.