The GoPro is sold in its plastic protective housing, which needs to be opened to insert a memory card. Again there are multiple YouTube videos about how to open the housing.
I try. No results.
Mule is more mechanically minded so I hand it to him. He tries. He sighs and watches a video. He tries again. He watches another video and tries again. He pronounces it broken.
I keep trying and it eventually opens.
The arrow that points to the rear of the housing, should be on the front side (instead of the top) of the housing and should be pointed up.
It and the button that moves sideways are pushed simultaneously to flip the catch up then back.
Alternative: Find a 12-year-old child to open it for you.