GoPro Hero 6 & Hero 7 Black are VERY sensitive to the correct SD card. For 64gb cards, GoPro ONLY recommends the SanDisk Extreme 64GB microSDXC UHS-I Card shown in this picture AND this is the ONLY SD card on GoPro's website, but this link will get you 50% off.
We have tested this SD card extensively on Hero 5, 6 & 7. Here are the results.
• GoPro Hero 5 Black is flexible and will accept all SD cards we tested.
• GoPro Hero 6 or 7 Black worked great with the SanDisk Extreme 64GB microSDXC UHS-I Card... BUT FAILED with ALL OTHER CARDS WE TESTED (even other SanDisk, Samsung and other cards too.) First step in troubleshooting a GoPro Hero 6 or 7 is to make sure you are using SanDisk Extreme 64GB microSDXC UHS-I Card!!!
We are testing Garmin VIRB XE and Ultra 30 now. Stay tuned.
Any questions, please email SDCard@YOLOtek.com or call us 800-488-5512 Thank you, Team YOLOtek