How to make a scratch disk

First thing you do is open final cut pro click on system settings.

Then when you go on system settings,you then set the "minimum allowable free on search disk" too 5000MB and click "OK"

You then make your own folder to save your work in where you save your project in.

You then name your work that you have just done in this case "Alex Jc footage" and then where the create button is you click on it to complete.