I put a sample PDF I created on my Mac in the Downloads file on my MyTouch G4 Android while it was connected to my computer.
I can't figure out how to access it, or if this is the correct place to put it.
Thanks for your help.
Do you see it listed in the 'Documents' list on Adobe Reader? If you don't, please confirm if you can see it in a File Explorer app on your phone (say, AndExplorer or Astro).