File structure

As you browse your collection using tags, why bother about the file structure?
In principle you shouldn't but in practice you better do.

Tagging is using software. Software is in general not bug free.

We are prone to make errors too. One day you have all of a sudden a list of songs with unknown album, artist, etc because the tagging failed you.

In cases like these it is convenient to have descriptive file names allowing you to re-tag them properly or even use a tagging program to generate the tags from the file name.
Sometime you miss a track from a ripped CD. If you organize your ripping in such a way that you have a folder per CD, it is easy to locate the missing one.

A lot of ripping software can be tailored to generated file names and folder structures for you.
Likewise a lot of media players can alter the file names and the folder structure if you change your tags.
Check these option before you embark on mass ripping or tagging.

 

Media players can do an automatic update too. In the background they query the internet database and update your tags.

If one day all of your own edits are gone, this might be the cause.