I have a small network backup device that does mirror backup to two HDDs. Recently the backup stopped working. When I check the hard drives in a hard drive reader, Windows caanot read the drives and tells me to format them.
I don't know what filesystem my network backup device uses so I don't know if the HDDs are damaged or if Windows simply cannot read them. I also don't think it's likely that both discs are broken.
What can I do to diagnose my hard discs, and if possible, recover the data?
