If you can copy a file from HDD or optical disc In windows, is it safe to assume the file is all there & safe to use as a backup? Or are there some small errors that were skipped?
So that if you kept copying a file from hdd to hdd over the years without issues, using only the previous file rather than original, would it be degrading or something & eventually the file wont work?
Before you back up from an older HDD to new one, should a 'health chk' be done on old HDD?
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When I back up important files I create a PAR2 recovery file set. With QuickPar you can verify the integrity of your backed up files, and repair the files if they become corrupted.They that give up essential liberty to obtain a little temporary safety deserve neither liberty or safety.
I have been backing up to hard drives for 20 years. Never had a problem. If it's really important stuff back up to the cloud and two different local hard drives.Extraordinary claims require extraordinary evidence -Carl Sagan