But as the title says I'd like to add my own beloved local files to the "Your Music". I don't see why this shouldn't be a possibilty. This way I don't need to have one master playlist, I can just have all the music I like under "Your Music -> Songs".
Also, as suggested earlier, changing the font size could be usable to many people.
Thanks for bringing us your feedback in the Spotify Idea Exchange. We're marking this as a 'Good Idea'.
Please know your feedback is reaching the internal teams at Spotify, and they're aware of the votes around this idea. We'll continue to check out the comments here, too.
In the meantime there's a workaround we can suggest to ultimately get local files added to your Liked Songs. First, add your personal music collection as usual from your Desktop app's settings, where they'll appear in Local Files. You can then add them to your playlists. Just right click > add to playlist. With Premium, you can toggle the download switch on your phone to transfer the local file to your mobile device. Note, that you need to be connected to the same network as your PC/Mac and have Spotify currently running on it. Once your track is synced to your phone, you'll be able to use the mobile app to add it to your Liked Songs as you would any other and it will show up on your desktop as well.
We know it's not ideal, but hope that it will be useful for some of you.
If there are any new updates, rest assured we'll let you know. Thanks