Quote:
Originally Posted by theducks
Hard drives can go bad without warning
Malware can get past protections
Backups can end up corrupt before you discover that fact.
Your 'cloud' service goes belly up.
Define 'Safe' 
Why not archive the 'Originals' to DVD/CD and store carefully, OFF SITE, on higher ground, not in a tornado/Fires path, away from a volcano...
You really can not have too many (managed) backups |
I was browsing the internet in search for an answer to the same question and somehow found this thread. Having read it, I registered an account to humbly present you with a prize as in my lifelong adventure with text I have never seen an answer to a question that would be as useless as yours. I still have no idea whether I can delete the duplicate from Calibre or not, but at least I had the pleasure of reading the response from fussygoat who told you in the most polite way possible where you can put this completely uncalled for advice of yours.