how can i sync my files

i have an example: lets say tht i have a word file on two diffrent locations, one file on my C driver or a network drive and the same files is on my flash drive.
so i opened my local disk version and modify little, edit ...etc
then insted of copy the whole file again, i need a tool or somthing that sync with my flash the diffrentials between those files
thanks in advance guys
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Hi you could use one of two options for free :)

1. Using Briefcase
The Briefcase feature in Windows XP helps you keep your files updated by automatically synchronizing multiple copies of individual files. In other words, Briefcase keeps track of the relationship between files on two or more computers. For example, if you use a desktop computer at the office, and you use a portable computer when you are on the road, Briefcase synchronizes and updates the files on your desktop computer to the modified versions when you reconnect your portable computer to the desktop computer.

Briefcase stores and displays the update status of files. It keeps track of whether a file is linked to the original file on your main computer, or whether it is an orphan file (a file stored in Briefcase that is not linked to another file). You can use this information to keep your files organized and to keep track of the most recent versions of your files.

Use Briefcase when you use two or more computers to work on files, and when you need to frequently transfer files between computers by using a direct cable connection or a removable disk.  Read More

2. Use SyncToy

SyncToy, a free PowerToy for Microsoft Windows, is an easy to use, highly customizable program that helps users to do the heavy lifting involved with the copying, moving, and synchronization of different directories. Most common operations can be performed with just a few clicks of the mouse, and additional customization is available without additional complexity. SyncToy can manage multiple sets of folders at the same time; it can combine files from two folders in one case, and mimic renames and deletes in another case. Unlike other applications, SyncToy actually keeps track of renames to files and will make sure those changes get carried over to the synchronized folder. Download from MS site..

Hope this helps!
ahmediefAuthor Commented:
i tried the SyncToy
but is there any other (paid) apps?
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