For info about storage capacity, see this:
You apparently have the camera in HD mode, which will fill the card faster. It also depends a little bit on how much motion there is. (The reason is that static images can be compressed to a greater degree.)
You might want to try the Event Only setting for the card. Most people find that there’s really nothing to see on the stored video if no motion has been detected, which essentially just wastes space on the card for all that static video.
The cloud clips, while offsite and therefore not subject to theft or physical destruction, are limited to 12 second clips at most every five minutes. The installed SD card, not the other hand, will capture all motion, no matter how long it occurs, up to the capacity of the card.