Hi rob,
best solution :
Open the Audya, extract the harddisk and connect it via an adaptor direct to your PC.
A complete HD backup needs only about 20 Minutes !!!
BTW: Copying "file by file" is not the correct way, if you put these files to another hd ( in case of an crash of the original hd ) it won´t work.
Backing up rigistrations, userstyles and so on works fine.
But for a "complete" backup you need appropriate software ( e.g. CloneZilla, or Acronis True Image )
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Greetings from East-Frisia ( Northern-Germany )