You can combine multiple video (up to 7) files on your Grid into one. This video shows how:
From the Grid you can either right click on a single video and then select the other videos you would like to add from other folders to make one video file.
The other option is to select multiple videos from a folder at once (CTRL + Click or Drag across the screen) and choose Combine icon in the top right of the Grid.
Note: If you would like to combine more than 7 videos at a time, break the videos into smaller sections. For example if you have 30 videos you need to combine, first combine 5 videos at a time into 1 video. Then combine the 6 new video files into the final combined video.