The Canon R6 is the first of Canon's full-frame mirrorless cameras to offer dual UHS-II memory cards. The camera offers a lot of performance with a lot of capabilities, which will require fast UHS-II memory cards. Buying memory cards for the Canon R6 isn't cut and dry since the camera offers so much versatility and there really is no best all-around card when factoring in price to performance. Slower v60 or even UHS-I cards might be all you need, but some users will need the best and fastest v90 UHS-II cards. Use this guide to figure out which memory cards are best for your situation.