There have been many questions about how to set up your disks.
Where do I put my media cache files, where the page file, and what about my preview files?
All these allocations can be set in PR, so I made this overview to help you find some settings that may be beneficial. It is not a law to do it like this, it is a generic approach that would suit many users, but depending on source material, workflow and backup possibilities, it is not unthinkable you need to deviate from this approach in your individual case.
The reasoning behind this overview is that you want to distibute disk access across as many disks as possible and get the best performance.
Look for yourself:
I hope this helps to remove doubts you may have had about your setup or to find a setup that improves performance.