The images from my SD card do not open on my computer.

By inserting an SD card into your camera, you can save the images from your camera and look back at it later. Ideal if you have lost a package or want to know who was at the door when you were not at home.
If you are unable to open the images from the SD card on the computer, it may not have been pre-formatted. You format an SD card by inserting it into your computer, then you get a pop-up with options. Here you can choose to format.
When the SD card is formatted, you can export it via the app and save it in your phone's gallery. You can then leave them on the phone, or transfer them to the laptop.