have tried to recover deleted directory tree from usb stick,
recuva reported, that files are unrecoverable due to they are overwritten,
by ........ the files from the same deleted directory tree,
this is fat32 filesystem,
so the files have gone,
so time for experiment,
in next step I writed a directory tree to the stick,
copied the whole tree to HDD just to be sure the files were correctly written,
deleted the directory tree,
and tried to recover,
the same - files are unrecoverable
This is probably because on file deletion the FAT32 file system sets the first two bytes of the data cluster address to zero. Thus Recuva (and any other software) will look at the wrong cluster address.
A deep scan might find the file but will only find the first fragment. As your files are relatively large they are likely to be fragmented, so this will be unsuccessful.
why my files are likely to be fragmented if they were written to an empty flash ?
deep scan gives the same result!
the problem is "the most comfortable" one for a recovery software
tree steps: write files to an almost empty flash, delete all of them, and recovery,
it simply means, that recuva does not work on fat32 filesystem,
loking for an other software
it simply means, that recuva does not work on fat32 filesystem
Actually it does work on the FAT32 filesystem, even with floppy diskettes. I've used it to successfully recover files from USB thumb drives with FAT32 and floppy disks which I believe are FAT12.