After I wrote More Griping About GoPros, I was having more and more problems with the GoPro Hero 5 Session “head camera”. However, after doing a bit of research, I found a microSD card that is fast enough for 4K video, and only $40 for 128GB! Samsung Evo MicroSD, so cheaper than the Sandisk Extreme that was crap. That was helping – I could record 90 minutes with just the camera (without the external battery) with no interruptions. But I was having problems with the camera. Sometimes it wouldn’t even turn on even though it had been charging overnight. Or it would act like it was only partially charged. Or if I hooked up the external battery, it didn’t seem to be getting power from it. When I enumerate the problems like that, it probably seems obvious to you, but it took me a while to realize that there must be internal damage or rust on my USB cable. A few bucks on Amazon later, and now I’ve got a working camera – I took it out today and got 160 minutes of continuous video with no interruptions. And just in time for this weekend’s race!