To use files on your Android device you must first add them to Documents To Go on your desktop computer and then synchronize. During the synchronization, a copy of the folder and file will be created in Documents To Go on your device.
With the program opened on the desktop, you can add files by clicking the Add Folder button to browse for and select the folder that contains the files you would like to synchronize to your device.
After selecting the folder you would like to synchronize, you will be presented with a list of all the supported items that exist within that folder. By default all items inside the folder will be synchronized, however you may uncheck any item that you don’t want to sync to your device.