I have uploaded some bam files to the public galaxy. I am working
with a collaborator who has a Galaxy account. Both of us are new, inexperienced users. How
can I give my collaborator access to my data?
Please read this wiki page for details about how to share your data with others:
In your case, you'll probably want to share a history with your collaborator. To share
a history that you are viewing in this history panel (right panel), click on
Options-->Share or Publish.