EXFO iOLM - Manual (Page 30)

Setting User Preferences
24 iOLM
Defining General Settings
2. Select the General tab.
3. Under the General tab, configure the following settings:

File Functionalities: If enabled, any user interface control related
to file functionalities (for example, Default path, Export OTDR
bellcore file, Generate report on save, Open, Save, Filename, etc.)
will be visible on the screen.
Note: If the File Functionalities option is disabled, the application does not notify
you with the warning message when files are saved. When File
Functionalities is disabled, the Default folder, Export OTDR Bellcore
(.sor) file on save, and Generate Report options are also disabled.

File Save Path: Enter the location for saving the files. This path is
used to save the iOLM files and OTDR Bellcore (.sor) files after an
acquisition.
Note: The default path provided by the operating system is used to save the files
the first time you start an acquisition.