I have inspected the backup on my server and they seem to be intact and testing shows the changes. Funnily it is the server I only trust 95% so I back up my files to my drives. I keep two external drives running as a home server using Wamp 1 terabyte and a temp drive 350 MB You can never be too careful.

I am a belts and braces guy. I keep double DVDs' of all my software purchased and created. Even every version upgrade CC ever put out that I purchased.

Ha, you can never be too careful. When I was programming desktop database apps, I would keep the original and one backup of the latest on a secondary disk. I always made fun of my boss because she never ever deleted anything, no matter how many revisions she had stored - until this one day I had to go crawling to eat crow...I never did live that down.