There are two main culprits when this happens: power and connections.
The smart case has to have power in it to initiate the connection to your computer.
If your smart case has power, power it off, connect the cable to your computer, power it on.
If your smart case battery is drained, no problem. Power it on and plug it into computer (this will kick start the charging). After a few minutes, power it off and on again. This should initiate the connection.
PogoCam comes with a USB-C (the little end) to USB-A (the common USB type) cable. In most instances, all you have to do is connect the USB-A end to your laptop or desktop’s USB port. If you have a computer with USB-C ports, you’ll want to use a USB-C to USB-C cable.
Most connection problems are caused when a cable of one type is routed through an adaptor or multi-port. Try unplugging the adaptor and plugging directly into the computer if possible.
If you are using a USB-C to USB-C cable through Apple’s USB-C Digital AV Multiport Adaptor, you will not be able to transfer. This is a known limitation of this adaptor from Apple. It transmits power only, not data. The smart case will work through a USB-C to USB-C cable. Simply remove the Multiport Adaptor and connect the case directly to a USB-C port.