I purchased two CFexpress cards from another vendor. They are supposed to be compatible with my new Nikon D6 (as stated by the vendor). They did not work and would not format in my camera. The vendor would not take them back or refund my money because my purchase was older than 30 days old. I decided that I would purchase two Sony CFexpress cards from Adorama. As soon as I inserted them into my camera they worked immediately. I'm thinking that Adorama is now going to be my go to for camera equipment.

I've been a photographer for around 35 years and in my opinion the Sony G-Series Tough CFexpress Type B Cards is one of the best memory cards I've ever used. Perfect for cameras with very fast shutter speeds and high resolutions, like the Canon R5 or Sony A1.

I usually shoot video in 8K NRAW on the Nikon Z8/Z9 which requires a very fast card that can read and write at high speed. I noticed that the price of the Sony card has come down significantly recently and, as I trust Sony, having had several XQD cards over the years in my Nikon DSLRs, I decided to try this card. II tested it in my my Nikon Z8 using various video codecs and frame rates and found it worked perfectly for all my needs. It has no problems recording 8K NRAW video at the Normal Quality setting, which is the one I always use, up to the max frame rate of 60 fps. The only problem the card has is when recording 8K NRAW at the High Quality setting at 60 fps where recording is interrupted. All other frame rates settings including High Quality 4K NRAW at 120 ... MoreI usually shoot video in 8K NRAW on the Nikon Z8/Z9 which requires a very fast card that can read and write at high speed. I noticed that the price of the Sony card has come down significantly recently and, as I trust Sony, having had several XQD cards over the years in my Nikon DSLRs, I decided to try this card. II tested it in my my Nikon Z8 using various video codecs and frame rates and found it worked perfectly for all my needs. It has no problems recording 8K NRAW video at the Normal Quality setting, which is the one I always use, up to the max frame rate of 60 fps. The only problem the card has is when recording 8K NRAW at the High Quality setting at 60 fps where recording is interrupted. All other frame rates settings including High Quality 4K NRAW at 120 fps have no problem - it is just the High Quality 8K NRAW at 60 fps. Lower frame rates of High Quality 8K NRAW are fine.Now to put this in context for anyone who doesn't have a Nikon Z8 or Z9, Normal Quality 8K NRAW is extremely high quality video and is visually indistinguishable from the High Quality 8K NRAW. It is not clear to me what sort of usage would require the HIgh Quality setting at all. I can't imagine myself ever needing to use the High Qualty NRAW setting for anything in fact and I am very fussy about quality in general.I also tested the card for shooting stills at the 20fps large raw setting which gives 45MP files. I got about 157 shots ( about 8 seconds) at this setting on the Z8 before the burst started to stutter. I guess if one needs to shoot massive 45MP raw files in prolonged bursts of 20 fps for more than about 8 seconds, then an even faster card might be required. Again I don't know what type of photography would require this type of usage as I imagine very fast action photography would not require such massive file sizes. I didn't test lower frame rates, smaller raw files (there are two other smaller raw settings) or JPEGs.Anyway I am very happy with the card, so much so that I actually bought a second one from Wex. I realise I could have bought a 500 GB card at the time of writing for £100 less than the price of two 250GB cards but having two has certain advantages.