Will this work in a gopro hero 7?
I should think so, it’s a Class 10, which is supposed to be fast.
Does each micro SD card come with its own adapter or is it one adapter for three micro SD cards?
It is worded a little funny. Maybe @ThunderThighs can say for sure.
Yes, indeed. These are 3 piece bundles so they are getting 3 packages, each with one SD card and its own adapter.