Where can I check how much storage I have left in the system?
On the General tab of the System Manager, click the Show System Storage Details button. It prompts the System Storage Details pop-up window to open where the video storage availability is listed by serial.

Serial: the serial number of the LS device,
Internal storage health: the storage state of a specific LS device of a server.
Video storage health: the state of the video storage (e.g., Promise), if any, is connected to the system.
Video storage availability: shows the total and available storage space on a specific LS device.
You can generally calculate with approximately 500-1000MB (1 GB) of storage space used per hour per camera in your LearningSpace system.