I've heard a lot about the speed of the card but it's confusing. What do I need to know about it?Updated 9 months ago

Card speeds are important to the overall performance of your camera. Here are three things you should consider:  

Transfer speed: How quickly data (images or video) can be downloaded from the card. Faster transfer speeds require less time to import photos or ingest video to your computer.  

Write speed: How well a card performs in a camera. Most camera manufacturers do not disclose an exact specification. Instead, they simply specify the speed class rating that the camera requires.  

Speed class: Professional-level cameras typically require higher speed specifications. For SD and microSD that is typically UHS-II and further defined for video with the video speed class V60 and V90. It’s best to match the speed of the memory card to the requirements of the camera.