I recently ordered a Hero 8 with the current offer of a free 64 GB SD card. The camera was delivered - but no SD card in the box. I contacted customer support who just said someon

With the HERO8 Black, GoPro has bumped up the maximum available video bitrate to 100 Mbps. That brings it up in line with the DJI Osmo Action (that’s unlikely to be a coincidence). That highest bitrate is available in some of the resolution/framerate options, including 4K60 and 1080p240.

There is the possibility of a compatibility issue with the SD card Use an SD card adapter to put the SD card into the computer. If the SD card is recognized: Download files you can using the adapter. Format the SD card. After the format, insert the SD card into the GoPro. Turn the camera on and reconnect the camera to the computer.

Hey Bill, the new GoPro Hero 11 is capable of recording using the full frame sensor size (8:7) in 10 bit color. This means that it records a heck of a lot more image information than previous models and to split the files at 4GB would no longer be an option. So it looks like it now chapters them to 12GB instead.

GoPro Hero 11 (HERO11) Black - Waterproof Action Camera with 5.3K Ultra HD Video, 27MP Photos, 1/1.9" Image Sensor, Live Streaming, Webcam, Stabilization + 128GB Extreme Pro Card and Extra Battery
GoPro Labs has added an experimental feature that’s available for the HERO11/10/9/8 Black and Max cameras if you use the corresponding beta firmware. It lets you increase the chapter size to 12GB. Keep in mind that it’s an experimental feature and might not always work as expected on all cameras.
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gopro hero 8 black sd card size