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Brent has given you all the steps to upload files.
However, from your tag I can tell that you were in fact experiencing a bug. Your files were there all along, but somehow they were not showing up in the file manager.
Someone worked on this, and it has been fixed now.
Please try again and let us know if you have the same problem. Everything should be working fine now.
I am sorry this happened to you, and thank you for reporting it!