PSR Tutorial song MP3s to ipad

[Mr. Gary]

I have moved from an Android pad to a new iPad.
Can I have some advice on how to download an MP3 song from our selection to the Yamaha Chord Tracker, is there a separate app involved for example.?
Yes, I have the Chord Tracker manual and I've seen all the You Tube videos but to no avail. I'd really appreciate step by step instructions.
Thanks in advance.