Cassandra, I did a word search of the MXP manual using the Adobe Acrobat search function (the little binoculars icon, in case you aren't familiar with .pdf files). No hits for ID3 or ID 3 anywhere in the document.
You are rong again. The player does not support tags. I am impressed that you can read but you do not understand. The software supports the tags. I have the MXP-100 right here and am trying to explain to you that you are reading that wrong.
The MXP uses files. Apple uses tags. Two systems. Im sorry that you cannot understand the concept.