Single MP3 uploads or requests are not allowed on OSA.

There are plenty of places for everyone to trade there rips etc. Soulseek is a popular one - Soulseek - Slsknet - File sharing software. Most people with old skool bizniss you will find in the oldskool 88 94 room (to find this refresh the room list).

The file sharing section is only for vids/mix uploads and requests

Cheers!