I downloaded an mp3 file from Briteon. I'm using Windows 8.1.
When I opened the Properties of the file in File Explorer, there was no Comments field.
When I opened the file in mp3Tag, I was able to enter the URL that was the source of the file in the Comments field on the left pane, but the Save button was inactive - both the button, and the Save menu item, so I could not put the Comments data in the file using mp3Tag, either.
Do I need to convert the file to another format?
If so, which one, and how do I do that?
Before you try to convert your mp3 into another format, please check your mp3 file, if it is valid and has no errors.
(The file may play correctly but this is not an indicator of whether the file structure is valid or not.)