please help
If it has been overwritten either by another file, or by some secure deletion method, or if it is zero bytes in size, then it can't be recovered. You could try a deep scan to see if there's a copy on the disk that can be recovered.
mmm interesting
i see have a png file i can clearly see but it says unrecoverable , has bytes aswell
Well try to recover it and see what you have.
Sometimes there are "more powerful" programs that can do the job. But it's about a 20% better chance. AND you'll need to purchase them. Depending what kind of file this is, the recovery program may be useful if it can do file-carving.
Which reminds me, can an expert in knowing Recuva's abilities tell me if it does file carving? This technique is useful for pulling back images that have been fragmented all over the disk.
I don't think so. Of course, it depends on the definition of 'file carving'. Deep scan conforms to forensicwiki's definition of file carving, but as for finding and joining file fragments from the data contents only, no.
There are several "varieties" of file carving. -- http://www.forensicswiki.org/wiki/File_Carving -- Which does Recuva do?
As far as I can make out Recuva's deep scan looks at free cluster headers and checks for a known file signature. I don't know where it gets the data length from, the file header? This way also doesn't retrieve or reassemble fragments, nor does it retrieve txt or bat files that have no file signature. I guess it's Header/Embedded Length Carving.
@Keatahplease keep in mind that, honestly, your answers aren't really helping the OP.
@lillody it may be that the thumbnail data is still intact on the file. I would also make the suggestion to attempt to recover it, however recuva is pretty good with telling the "red-yellow-green" status of files in my experience