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I have a few offices of businesses I need to backup remotely and I was wondering what would be my best options as far as doing that to ensure no one can access each other files. The systems are mostly Windows.

So far the only idea I've come up with is use FTP and assign each user their own FTP account per computer.

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Using FTP is not a good idea for backup since it is neither secure nor robust.

The first thing to understand is what kind of backup you want - just some data on a server, data on a set of workstations or a total backup of everything so that you can restore whole machines direct from the backups.

If you are not experienced with this kind of thing, I strongly recommend the use of a utility that will automate everything.

For example CrashPlan has a free, basic, offering that allows you to install it on as many machines as you like. You can then designate some of those machines as "hosts" that others can backup to. The backups can be fully encrypted and the whole application password protected. At any later date, you can also then decide to expand the backup to CrashPlan's own servers at a very low cost.

So lets say you have 10 PC's that you want to back up. Three of them have either plenty of spare disk space or you buy an external drive for them. Each of those three are then set up to receive backups from ALL 10 PC's (yes, including the local PC) - now you have 3 lots of secure backups for all PC's, the minimum you should be looking for.

Crashplan also maintains old versions of files, users can restore their own files if needed and, importantly, it only backs up changes to files not the whole file. So if you have a 100MB Word file where a couple of pages get changed, it will only copy across the changes not the full 100MB so saving bandwidth. It is also able to de-duplicate files to save space.

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Don't really need restore for machines. Just emails and other private and personal information of that nature and would like to back them up and isolate them so no one else can access them. So it would be backups from systems from a bunch of different businesees –  Rachel Nark Jul 18 '12 at 20:01
    
OK, Crashplan is a good recommendation then. Check them out and maybe set up a couple of machines to get the feel of it. –  Julian Knight Jul 18 '12 at 20:09

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