I periodically back up to an external hard drive, as a good girl should, and just wondered if, when I do this, it will back up all the files it already has stored from the last back up I did, or will it "update" so to speak, and only back up new stuff?
I haven't really downloaded much in the last months, but it keeps reminding me to do so, and I'm just wondering what it is doing and how long this should take. I am running windows 7.
I am not very techie, as you will have gathered, so if anyone is kind enough to answer please use child friendly language :)
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