Convert data to NWB

Configure NWB variables

Go to Tools > Nwb > Configure NWB File

Select Show Custom Variables

PrimaryGroupName = Acquisition

NwbModule = base

NeuroDataType = TimeSeries

Close the window to save (no save button)

Write NWB Files 

Go back to Overview session tables

Select session

Go back to Overview session tables

Select session

Go to Data > Nwb > Write NWB File