A:AnswerIf the mount you're using is a standard thumbscrew connection that uses the mounting fingers on the GoPro, then yes, the HERO8 Black should work. All of the GoPro cameras over the past several years use the same connection system.
A:AnswerGoPro cameras use a microSD card. Look for one with at least Class 10 or UHS-1 rating. SD cards made by Sandisk, Lexar, or Samsung have had great results in GoPro cameras.