CFexpress Type A cards are still a relative rarity in the memory card world. Since they were first utilized by the Sony a7S III in 2020, the format has been used in several full-frame Sony bodies, but other camera manufacturers have stuck with the physically larger, and (generally) faster Type B variant.
We say "generally", as not all Type A cards are inferior to their Type B siblings, and this Lexar card is a good case in point. It uses the next-gen CFexpress 4.0 standard, which makes it twice as fast as the first generation of Type A cards (confusingly called CFexpress 2.0). This makes CFexpress 4.0 Type A cards just as fast as version 2.0 Type B cards (CFexpress 4.0 Type B cards are twice as fast again, but precious few people actually need that much speed).
