Start by logging into Blackbird.
Press the upload icon which is indicated by the arrow pointing to the cloud.
This will bring you to a webpage where you can upload media including AAFs. Press the "Choose files" option at the bottom and browse to your AAF on your computer.
Select the AAF and press "open" which will begin the upload into Blackbird.
When this has completed, you will be able to see the AAF within the Blackbird "files" menu.
If you're still having trouble please contact us at support@blackbird.video and one of our Support staff will then contact you with suggestions on how to resolve this issue.