ok;
so done compressing with srep+lolz bff files 45.6gb > 95.6gb > 42.4gb > 18.9gb
bdt+oo2reck took around 3 hours...
edit : decompression it get to 4.7% remain stuck then data corrupt
it seem that bdt disappear in the processes but oo2reck continue to work for while then i get error