Anyone wanting to retrieve their file from the SSA there is a very simple and free way to do so.
This file can be emailed to you. You must contact the OHO office. It is fastest to contact the person who you have previously been in contact with, the person who called you prior to your hearing.
They will give you a password to open the file. My local hearing office emailed me a copy prior to my hearing, though I lost the password.
All I had to do was send a reply to the email I previously received, made a phone call to the OHO office and left a message for the same person in the email. She quickly returned my call. I will however have to obtain the transcript of the hearing from my local office or the appeals council.
Hope this helps