The recovery software found these files. I used Recuva, Puran, EaseUS... they could not find it. Only Recoverit from Wondershare was able to dig it. However it seem to be unusable.
possible recover file damage then eques blank file
netbook not useful anymore
back to find thumb drive save old dat file it still not format to reused and overwrite it may be keep at home
other way give away to puzzle (no hint) and challenge people to recover it may be next 2 year some one can open it again. (or forever)
don't forget store large 30GB file VHD with in share file online and register affiliate links with require premiere to download may be help to cover lost a little
sorry for can not help
don't give up may be help to can recover some day hope so