Can I do my backups over the internet

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I look after an office with 20 PCs and a server, and we run weekly full backups and daily incrementals. Backups are to a USB-attached hard disk, which is taken off-site overnight. What I'd ideally like to do is carry out the backup process over the internet, to a remote PC with the backup drive permanently attached to it, to avoid physically transporting the drive. Full backup is around 120GB of data, incremental is 5 - 10GB. What would you recommend as the best method to achieve this? (using an internet hosted, paid-for backup service is not an option - too expensive!!)
On-line or internet hosted backup services (the ones you're avoiding for the cost in your situation) are becoming very popular. They definitely have their place, but they also make me uncomfortable.
And they make me uncomfortable for the same reasons and issues that you're going to run into with what you're attempting to do.

Posted 23-May-13 7:45am

Mickael Grad

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Sergey Alexandrovich Kryukov 23-May-13 13:47pm

So, what's the discomfort? Too expensive? Backup is always a problem...
—SA

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OriginalGriff · Accepted Answer · 2013-05-23T08:10:00

120GB is a lot of data to transfer to the internet on a regular basis: look to your connection speed (specifically the upload speed) and work out how long it will take, on average, to transfer it.
If you assume ten bits per byte instead of eight, it both makes the math easier and allows for the packet overhead reasonably well.

So if you have a 20m bit per second upload, that's about 16.6 hours:

120E9 * 10 = 1.2E12
1.2E12/2E6 = 60,000 seconds
           = 1000 minutes
           = 16.666r hours.

And that's pretty much a best-case scenario @ 20mbit/sec upload.
How often are you going to do a full backup? :laugh:

I backup the backups of essential data to the internet, but even then I keep the total below 10Gb to make sure it takes a reasonable time.

Even Google write data to an array of HDD's and physically ship them round the world - they do it so often they even have a name for it: FedExNet