S380 HomeBase - Installed new SSD - % Storage availability has remained unchanged

I have installed a new SSD to my S380 HomeDrive, about 2 months back. When I check storage management section, % of storage availability has always remained same at 98%. This is not changing, even though, 2 cameras attached to this Homebase are capturing events.
When I check each of the cameras, I can traverse through the events, back to date I installed the SSD.

Kindly let me know what may be wrong, that the HomeBase is not showing change in storage % availability.