We have been experimenting with our HERO 4 with a 64GB card, to see how much filming you can do on different settings before the card becomes full.
Are results are as follows:
GoPro HERO 4 (64GB card) Protune OFF
|Quality||Frames Per Second (fps)||Amount of video (Hours and Minutes)|
These are just what we have found, others may have found it to be different.
If you have used or have a GoPro Hero 4, and have found something different to what we have above, please feel free to let us know!