While some cameras share the same SD card size and format, others use different types entirely. Here's the breakdown: Standard SD cards: These are the larger cards typically used in DSLR cameras. They are not compatible with GoPros. microSD cards: These are the smaller cards used in GoPros and many other action cameras. Some DSLR cameras also use microSD cards, but not all. Generally, using an SD card in a different camera is not recommended. Even if the size and format match, the camera might not be formatted for the specific card, potentially leading to data loss. Always stick to the recommended card type for your camera.