Local files not showing up in folder

[ZWKO]

Plan

premium

Country

UK

Device

Laptop

Operating System

Windows 10

the problem is i have been trying to add songs to my Local Files on the desktop spotify but they wont show up in the folder no matter what i do

I have tried

uninstalling and re installing spotify

specifying what folder to find the music in

deleting the index.dat file

Turning Hardware accekerate on/off

i have managed to do this before in the past on my old laptop but since i got my new one i havent tried untill now and its not wokring

[ZWKO]

forgot to say 

they are all in mp4 format which is compatible with spotify