EXFO FTB-1 - Manual (Page 109)

Working with Your Unit
FTB-1 99
Setting Storage Parameters for Screen Captures
5. From the Browse for Folder window, select the folder that you want to
use to store the screen captures. If necessary, you can create a folder.
6. When your selection is made, tap OK.
7. Tap OK to confirm the changes and close the window.