Temperature-proof: Withstands operating temperature range from -13ºF (-25ºC) or 185ºF (85 ºC) and non-operating temperatures from -40ºF (-40ºC) or 185ºF (85 ºC). Another professional high speed option for DSLR and video cameras which provides filmmakers with up to 525MB/s in 64GB-512GB capacities and VPG-130 support. Compact Flash

Actual transfer speeds under our testing churned out a write speed of 33MB/s and read speed of 82MB/s; not too bad, but the write speed is close to the minimum V30 classification on the label, so that's worth bearing that in mind if write speeds are important to your work. SD cards are flash memory, which means they have no moving parts and instead rely on electronic chips to store data. While they don’t require power to store data, they can be damaged via water, fire and physical pressure. Some companies offer bespoke 'tough' versions that can withstand these elements, even remaining safe in extreme temperatures, so it's worth looking for those if you're going on an adventure. Vibration proof: Vibration resistant (10Hz to 2000 Hz, 6Grms, 5 minutes per 1 cycle, 10 cycle per 1 axis total 30 cycles per 3 axis, based on IEC 60512-6-4 guidelines).When it comes to compatibility, these cards have worked flawlessly with both my Sony A7R IV and Panasonic G9 cameras. I haven't experienced any compatibility issues or error messages, which is a relief. It's nice to have a memory card that plays well with different camera brands. Micro SD cards are also available with a range of speeds and capacities for phones, tablets and other devices. Card classifications like V30 or U3 are just categorizations of these speeds. There are three main classes: Speed Class (denoted with a number in a circle), UHS Speed Class (a number in an open beaker-like icon), and a Video Speed Class (V followed by a number). The numbers indicate the minimum writing speed when put under data transfer. Speed class is categorized into Class 2 (a minimum write speed of 2MB/s), Class 4 (4MB/s), Class 6 (6MB/s), and 10 (10MB/s). Choosing the best one for your camera depends on your camera's resolution, buffer size and burst shooting speeds. An additional clue is the UHS Speed Class rating, which is U1 or U3. U1 means it can write a minimum of 10MB/s (like Class 10), while U3 pushes the write speed up to a minimum of 30MB/s. More interested in shooting video? The Video Speed Classes are V6, V10, V30, V60, and V90, with V6 suitable for standard definition video recording and V90 capable of 8K video capture. 4K UHD video recording will require a minimum of V10 ideally, and HD video can utilize V6 or below at a push. How we test SD cards

In keeping with the Gold series name, the Professional 2000x cards have a splash of gold on the label, making them instantly recognizable amongst a pile of other cards. Next generation ultra high speed professional cards for pro video cameras and DSLR to record high definition seamless RAW 4K video. Capacities between 64GB - 512GB and speeds up to a staggering 1750MB/s read, 1000MB/s write. CFast (including 2.0)This card is a great price, but that means nothing if it can’t keep up with the speeds demanded of it by the latest cameras.