The Content Manager Assistant for Playstation Vita allows you to transfer files between your PC and Vita.
As soon as you connect a Vita to your PC, the Content Manager Assistant will start. Right clicking the neat icon in your system tray will allow you open settings. Here you can specify which folders the Vita will access, although you can't change anything while a Vita is connected
You can use the Content Manager Assistant to backup your saved games and application data, as well as any photos or videos you have on your Vita. You can also transfer media files to you Vita from your PC.
The Content Manager Assistant is functional, but not incredibly user friendly. It would be improved if there were more options on the Windows app itself - more like the relationship between iTunes and iOS devices. If you have a Vita, the Content Manager Assistant is an essential driver, but it's not an outstanding piece of software.