Premier Pro, setting up where to store cache, project files etc

[Petrolhead]

First the PC spec so you know what I am working with:

Intel i7-5820
32GB DDR4 Ram
Gforge GTX 960
OS drive 256GB N.2 PCIe SSD
Data 2tb mechanical hard drives
256GB SDD
125GB SSD
Win 10 Pro

So I obviously the program on the OS. My finished work is on the 2tb drive which is backed up daily.

So I need help re scratch disk, cache disk, project files and media

 

[Petrolhead]

Thanks

What is the scratch disk