Look again. There isn't 71GB used. Only 71MB!. This drive is clean. No files reported by the OS. The 71MB is used by the OS and filesystem for various stuff (MFT etc.)
You cannot! use PM to recover the files. The files are gone from the filesystem and thus you need to use some data recovery tool to get it back.
I recommend GDB (<A HREF="http://www.runtime.org/" target="_new">Get Data Back</A>). I have used this with great success a couple of times.
<i><b>Engineering is the fine art of making what you want from things you can get</b></i>