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Some recovered file names start with $$_

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From my very old experience of Unix (not used it for years).

In a Unix Bash shell $$ returns the Process ID of a running script .

I'm assuming that Recuva is using Unix or Linux to scan the disc, (many/most recovery tools do), and is using the process ID's to generate temporary filenames for whatever it has recovered.

Here's a bit more about these Unix special parameters that start with $ for anyone interested:



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