Storage Statistics on Non Contour Motorola DVR Box

There used to be a way to display the total amount of program storage space on the Cox DVR's.

It would display the total amount of storage on the DVR and how much was used and how much was available.

My DVR is a Motorola 3400 (not Contour) DVR Box.

Can you tell me how I can access this storage information? (And not by just looking at the DVR List Page).

Thank You