did you order the SD cards from go pro? I know the Black is very picky about which cards to use.
Mine. Kiehl's has 20% off!
I purchased them from Best Buy, they are Class 10 MicroSD cards, which work good at 1080p res.
If I plan on jumping to 2.7k or 4k I'll pick up an Extreme card.
The majority of my "home movies", etc will be 1080 for the time being and I may go higher later on.
GoPro states on their website that Black Edition cameras shooting 4k, 2.7k or ProTune need SanDisk Extreme or higher cards. 1080 and lower without Protune and any Class10 card will work.