Setup > Audio > USB Audio

The maximum USB recording time for a single track is 3 hours.

The horizontal blue graph with the legend ‘USB Space’ underneath displays how much space is available.
The remaining space is displayed as a fraction of the total capacity of the drive.

When you start to record, the time elapsed and available time remaining will be displayed in HH:MM:SS

Recordings will be saved on your drive in the following folder

X:\AllenHeathGLD\USBRecord