Q: iTunes unable to locate iTunes Media Folder after transfer from PC to Mac?

Hello

I recently purchased a new Mac Mini, and have been attempting to transfer everything from my old PC to it.

One of these things is my extensive iTunes library, including all of the media, and my iOS devices back-ups. I've been following these first two articles to the letter, as I was using an external drive to transfer my media (my iTunes library and Media folder were already on an external hard drive when in use on my PC):

How to move your iTunes library to a new computer - Apple Support

Back up your iTunes library by copying it to an external drive - Apple Support

Create and delete iPhone, iPad, and iPod touch backups in iTunes - Apple Support

However, after following the second link all the way through without issue, i've run into difficultly at the final stage (screen shot below):

I am able to find the iTunes Library file. It is called 'iTunes Library.itl'. I click, and it seems like everything is fine as iTunes opens up.

However, none of my media can be found. The only media shown is that which I have purchased via the iTunes store (as I have logged in, which has been successful). I have tried checking in preferences, but I have definitely linked to the right folder as well (see below screenshot).

I'm at a loss at what to do next! Any ideas why this might be happening appreciated.