Audio folder. Warning!! May be a dumb question!! :)

I've read many times that you should have a drive dedicated to audio. Cool.
 
Now the potentionally dumb question - WHICH audio files?
 
Samples? Loops? BFD2? The wavs created in projects?
 
Thank you for your time.

It depends on how you work, what kinds of projects you work with, whether you routinely freeze soft synths, whether you work with large sample libraries, whether you use more than one library at a time, and so on. If you don't do MIDI and just record live audio, you may not need multiple disks at all (except for expanded storage and backups).

Think about it in terms of data movement. Picture in your mind how data is moving around, and try to arrange things so that disk drives are not asked to do more than one thing at a time.

Example: bouncing a soft synth. Here you have data being read from disk (samples) while at the same time data is being written to disk (bounced audio). If one disk holds both your sample libraries and your project audio, you're making the drive do two things at once, which it can't do efficiently. Two separate drives, one for samples and one for recorded audio, are the solution.

If you use multiple samplers and don't freeze them, you are still making a drive do more than one thing at a time even if you have separate disks for samples and recorded audio. This is true, for example, if you load multiple libraries (or even multiple articulations of one sample set) into a single instance of a player. In this scenario, you can make a case for splitting sample libraries across more than one physical drive (which Kontakt makes easy but not all players do).