MP3 posting (Patreon)

Hi guys! So I have managed to figure out a work around for hosting Patreon only videos using my phone, but there is not option to upload an MP3 from my phone. The people at Patreon still don’t have an answer as to why I cannot post from my laptop and tbh it’s very frustrating. At least they have said it’s a fault on their end.

If any of you have an alternative solution on how to share MP3s that isn’t too time confusing, then that would be great!