Which cache folder and what cache usage do you see on the about:cache page?

What exactly did you enter on the about:config page?

Maybe attach a screenshot of that setting.

in the About:cache under cache directory I see: C:\Users\Owner\AppData\Local\Mozilla\Firefox\Profiles\ylsryvx1.default\OfflineCache

in the About:config I see browser.cache.disk.parent_directory and the folder is just something I created: D:\Firefox\FF Cache I also tried typing in D:\\Firefox\\FF Cache but that didn't help either.

I've restarted both my computer and my browser.

Maybe try to use a folder name without spaces.

Did you close and restart Firefox and made sure that the folder exists?

You can also try to remove the old cache folder on the C drive in AppData\Local\.

Changed the folder name to one without spaces, restarted firefox, and I made sure that the folder exists, only thing I haven't done is delete the old cache folder in appdata

I just deleted the folder C:\Users\Owner\AppData\Local\Mozilla\Firefox\Profiles\ylsryvx1.default\OfflineCache

but it just came back

Can you post the line as you see it in the prefs.js file?

Okay so this is what I just did and it worked to an extent, I uninstalled firefox from my SSD and put it on my standard HDD and repeated the browser.cache.disk.parent_directory method, I put the cache files in my firefox install folder, the problem is that when I go to about:cache my cache directory is in my data drive but my offline cache is still in my SSD how do I put the offline in the data drive too, and exactly what is the offline cache.

Oh never mind I just disabled offline cache in about config, by setting it to false