I have used testdisk because I found your instructions in some other thread two days ago. However, I do not know how to use testdisk in both modes, like Fat Undelete hidden in Advanced and Analyse. With advanced, I found a file that I have intentionally deleted myself the other day.

I could not see any of my "old" files. I suspect that is because there is a "new" data structure ("new" MyDocs) so I can not get to my "old" MyDocs in a regular manner.

Considering the overall strange behaviour of what used to be my favourite tool I am now contemplating reflashing the device. However, I learned that this does not neccessarily leads to a clean MyDocs.