If you want something easy, I found my computer had a mSATA slot on it (it looks a bit like the new M.2 slots, if I"m not mistaken, but the drives themselves are much shorter), so I bought and slapped a 1 TB drive in there. Most laptops seem to have them, so take a look- if you do, the drives are pretty reasonable and an internal is always more convenient than an external. (it could be this is what your system drive already is- or there might even be two of them!)
As Mattias points out, drive speed will only affect sample loading and the stability of those instruments that use DFD streaming.
As Mattias points out, drive speed will only affect sample loading and the stability of those instruments that use DFD streaming.
Sample library developer, composer, and amateur organologist at Versilian Studios.