Are there any limitations on how much data can be stored in my Private Area?

No, there are no limitations on how much data can be stored in your Private Area. See demo.

There are no geographic or other limitations such as how often you can use the Private Area or from what devices, etc.

For example you can monitor your personal cell phone and the cell phones of your children as well. You can store in your Private Area all the data from these cell phones, including the images and the video files. Of course just is just an example to demonstrate that there are no limitations.