Was following a tutorial on using luts and at one point they showed how to copy them to the presets luts folder. However, that was on a MAC and I use a PC. I looked in the presets folder but could not find a 3dluts folder
Have you got one called CLUTs? If you have neither CLUTs nor 3DLUTs, you can try making one. I don't think Windows and Mac would use different names for the folders. (I'm on a Mac, as you can guess.)
Forgot to add, I'm looking in the user Library, under App Support, and Photoshop 2019 Presets folder. Your Windows path would be slightly different, but I think you can get to the right spot for adding to the Presets folder in your user library. When I look in the Application folder, instead, I have 3DLUTs, but they're not all there, maybe because I save presets that don't ship with PS to the library Presets folder.