Updater - an effective tool to create patch packages for software and file updating.

Instead of uploading different versions of similar files to the server (e.g. a new version of the program or data file), you can upload just the differences between the old and new file (update). The update file is usually much smaller then the entire file of a new version. Offering your customers a download of updates instead of the entire file, you will effectively decrease the traffic from your server.