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I enjoy FreeFileSync (<a href="http://sourceforge.net/projects/freefilesync/" rel="ugc">http://sourceforge.net/projects/freefilesync/</a>) However I do not know how well it might work over the internet.
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I enjoy FreeFileSync (http://sourceforge.net/projects/freefilesync/ [http://sourceforge.net/projects/freefilesync/]) However I do not know how well it might work over the internet.

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Novell just released a new product called Filr.<br />
You might want to check it out<br />
<br />
<a href="http://www.novell.com/products/filr/" rel="ugc">http://www.novell.com/products/filr/</a>
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Novell just released a new product called Filr.
You might want to check it out

http://www.novell.com/products/filr/ [http://www.novell.com/products/filr/]

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none of the other answers worked for me.
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<div class="content wysiwyg-content">
I have a project coming up in which I will need to copy users Outlook PST files over the internet. File sizes will range from 10-20 GB. I need a program that supports<br />
<br />
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Delta / Block level support<br />
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Resume pause or stopped downloads<br />
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Copying Locked files<br />
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Copying files over the internet<br />
<br />
I was thinking about using Git but it does not have any resume function I could use to get that first backup. &nbsp;I have also looked at qtdsync. <br />
<br />
My plan was to setup the sync and let it run for a week or so to get the first backup. Then when we are ready to move forward we can run a sync which should only copy parts of the file that have changed an thus take significantly less time. The client computers will be running windows and the server could be running windows or linux depending on what is needed. <br />
<br />
The program should be open source or free.
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I have a project coming up in which I will need to copy users Outlook PST files over the internet. File sizes will range from 10-20 GB. I need a program that supports

	Delta / Block level support
	Resume pause or stopped downloads
	Copying Locked files
	Copying files over the internet

I was thinking about using Git but it does not have any resume function I could use to get that first backup.  I have also looked at qtdsync. 

My plan was to setup the sync and let it run for a week or so to get the first backup. Then when we are ready to move forward we can run a sync which should only copy parts of the file that have changed an thus take significantly less time. The client computers will be running windows and the server could be running windows or linux depending on what is needed. 

The program should be open source or free.

File sync options.

The term "Backup" means the methods and processes involved to copy computer data (system data as well as application data) to media other than the ones where the data originally live (disk, tape, optical, cloud). "Restore" in turn means the methods and processes involved in data recovery, i. e., bringing back copied computer data to their original location. Backup/Restore primarily serves as a means of protection against data loss, be it due to disaster, corruption or sabotage. It can also be used for recovering data from an earlier point in time and even for cloning machines or applications. There is a wide variety of backup/restore software available, from expensive commercial products to free or open source tools.

Storage Software

Computer data storage, often called storage or memory, is a technology consisting of computer components and recording media used to retain digital data. In addition to local storage devices like CD and DVD readers, hard drives and flash drives, solid state drives can hold enormous amounts of data in a very small device. Cloud services and other new forms of remote storage also add to the capacity of devices and their ability to access more data without building additional data storage into a device.

Storage

Exchange is the server side of a collaborative application product that is part of the Microsoft Server infrastructure. Exchange's major features include email, calendaring, contacts and tasks, support for mobile and web-based access to information, and support for data storage.