Synctoy is Microsoft's solution to the syncing issue. I have to admit that they have touched the right point: we have our cell phones, PDAs, laptop computers, netbooks, USB sticks, external hard drives, and personal spaces on the Internet. How could we track which one has the most recent version of this particular file?
I will assume a case where you have an portable disk connected to your Windows computer. Habitually every day, when you finish your work, you copy your data to your disk and remove it. When you get back home, you find out that you forgot to copy your files to your portable disk. Let's make sure that you will not face a situation from now on.
We go to the Synctoy 2.0's download page and click the download button. Synctoy requires .NET Framework to run, so I recommend you to upgrade to the latest .NET version on your computer, although version 2.0 is fine with Synctoy. The installation does not require a reboot.
When you open the Synctoy, you will see a very simple window. Before getting our hands dirty, let me explain the logic of Synctoy. To be able to synchronize something, you need to have a main file/folder that you are working on and a place that you want to have them synchronized. In our example, suppose that you have your working files in My Documents\Work\Reports folder and you want them to be synchronized to \Work\Reports folder in your portable disk. In Synctoy's usage, the left folder is the main folder and the right folder is the folder where you will synchronize. In our example, the left folder is My Documents\Work\Reports and right folder is \Work\Reports.