Clonestone is a free file cloning utility written in .NET. Coping your files to an external/internal disk or a network drive without interruptions. Although it sounds as a backup program it's not. It supports scheduling and extension filters, alerts and other smart features!

Cloning files from source to destination with the a touch of a button.
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Download size: 1.9MB - Version 0.4.1b*
Absolutely FREE!
Clonestone - System Requirements

C# version of Clonestone...some screenshots added...
Posted on 26.04.2009 ByVERITAS  
The new release of clonestone is ready but still not available for download even if is is working fine. Corrently working status: Job Threading. Some screenshots added here  
 
Download Clonestone Express, an easy-to-use file clone utility, absolutely free.
Set Your Own Schedule
Quick & Easy
Quick and easy user interface. Double click and start cloning files.
Save a little or a lot Create Jobs!
Create jobs and manage your cloning files at any time independent.
Save a little or a lot Set on schedule!
Set every clone job on a schedule mode, have your files clone bythemselfs.
Save a little or a lot Methods for!
Choose between simple, mirror and archive clone methods for the best outcame.
Save a little or a lot Filtering!
Every job has it's own extension filter, providing the ability to choose the context of every output.
Save a little or a lot Logging!
Continues cloning without interruptions may cause problems that should and must be notified. Logging every job is the best way.
Save a little or a lot SMTP Alerts!
The ability to send email alerts for every job containing logs, regarding the status.
Save a little or a lot Import / Export!
Export or import all the necessary information about your jobs in simple XML format.
Neue Freeware