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In my computer I have 2 HDDs, so using FreeFileSync I have a backup of important files in one disk in the other disk.

I was thinking in installing it on a laptop too, but the laptop only has one disk.

Do you think it worth? Backup the files in the same disk? If the disk crash both files will be lose so I think it's just a waste of space no?

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This isn't a security question. – Polynomial Nov 28 '12 at 18:53
Hope you kidding. Backup files isn't security? If you think so, you should look in security areas such as disaster recovery. – yzT Nov 28 '12 at 18:55
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@Elemenophee Backing up is a part of preventive security in the strict meaning of the word, it's just that this website focuses more on secrecy and privacy of data rather than where you actually store it. This question would fit fine on superuser or serverfault. Edit: For example in this question, where/how you store data is more a method to keep data private, rather than whether it adds to the integrity/availability of the data. – Luc Nov 28 '12 at 19:03
@Elemenophee General home backup scenarios are off-topic here, unless they specifically relate to the confidentiality of those backups. Whilst I agree that "IT security" covers a broad range, purely operational business continuity questions are outside that scope here. – Polynomial Nov 28 '12 at 20:39

closed as off topic by makerofthings7, Polynomial, Jeff Ferland♦ Nov 28 '12 at 18:54

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Backing something up to the same disk can help in case of accidental removal, or when malware tries to delete specific files. Whether you think it's worth it to give up half your disk space for this is up to you. I'd think of it more as a versioning system rather than a back-up.

A back-up should be off the disk at the very least, because that's what you're mostly protecting the data against (broken or stolen disk), and off-site and redundant at best. An alternative in this case would be to back-up your laptop on your desktop and vice versa.

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Well I forgot to mention. I'm talking about real time sync, so in case of accidental erase both would be deleted. – yzT Nov 28 '12 at 18:49
@Elemenophee In that case it's really just wasted disk space I think – Luc Nov 28 '12 at 18:50

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