When using a GoPro Session Action camera it’s important to ensure that an approved MicroSD card is used. As this short video demonstrates, this really makes a difference to the performance. Two 32GB SanDisk MicroSD Cards, the first is the “Ultra” brand and the second the “Extreme” model which is listed on the approved card list. With the “Ultra” card it takes 30 seconds from the button being pressed to the camera starting to record. This is cut to just 2 seconds when using the “Extreme” card.
Lesson learned- don’t just use an existing SD card assuming that it will work correctly in all devices.