Review on 📷 SanDisk Extreme 256GB SDXC UHS-I Card (SDSDXNF-256G-GNCIN) [Updated Version] by Daniel Drury

Preface: You probably don't need this card if you're just an amateur/casual photographer or if you need it for a handheld device like the Nintendo 3DS. I would just take something cheaper. I don't usually write reviews because I'm too lazy, but since this is a new map and there aren't any reviews, I decided to chime in. A little background about me... I'm a mid-range photographer/videographer shooting mostly 1080p/24fps and 1080p/60fps video with a Canon 70D, so I can't really comment on 4k footage (sorry), but I contains average values (including 4K) from the Crystal Disk benchmarks I ran. Using a DSLR The card writes very quickly, so images appear on the LCD screen almost immediately after capture. In addition, a quick glance at the photo gallery causes almost no delay in displaying the image. The card does a great job with continuous shooting. As you can imagine, the Canon 70D has a pretty good burst speed that doesn't slow down unless you're shooting in RAW. However, most of my SD cards turn off after the 40th shot or so and the camera is forced to take pictures at a slower speed until the card "refreshes" and gets back to full speed. Not so with this card. It held up beautifully and the camera hit the buffer when it was supposed to, not before. This is good news for action, wildlife and sports photographers. use a computer I recommend that you carefully study the following test results. The read/write speeds correspond to the 90 and 40 Mbit/s specified by Sandisk, but are sometimes slightly lower or higher. Transferring 20 gigabytes of photo/video is very easy, but obviously takes less than twenty seconds - let's be honest with our expectations, it's not an SSD. Unfortunately, like other cards, it runs at a advertised speed of around twenty seconds and then drops to half that speed for three to four seconds before returning to 90Mbps. The same applies to the write speed. I believe this is because the card is buffered, much like a camera in burst mode. If I'm wrong please correct me. The test showed read/write speeds a few Mbps faster than what Sandisk claims, but I found them typically 90/40. Overall, I recommend this card for really advanced camera users and above, although I'm sure serious pros would use something better, especially those who do serious video editing and need to read/write their SD cards quickly. Again, if you're just starting out in photography, you don't need this card, but if you can afford it, why not.**Tests:--------------- - -- ------------------------------------------------ --- --- --- --CrystalDiskMark 5.0.2 x64 (C) 2007-2015 hiyohiyo Crystal Dew World: http://crystalmark.info/--------------- --- --------------------------------------------- --- -------- --------------* MB/s = 1,000,000 bytes/s [SATA/600 = 600,000,000 bytes/s]* KB = 1000 bytes , KiB = 1024 bytes Sequential read (Q=32, T=1): 93.330 MB/s Sequential write (Q=32, T=1): 49.148 MB/s 4 KB random read (Q= 32, T= 1) : 9.934 MB/s [2425, 3 IOPS] 4 KB Random Write (Q= 32, T= 1) : 4.057 MB/s [990.5 IOPS] Sequential Read (T= 1): 95.617 MB/s Sequential Write ( T= 1 ): 48.860 MB/ss 4 KB Random Read (Q= 1,T= 1) : 9.425 MB/s [2301.0 IOPS] 4 KB Random Write (Q= 1,T= 1) : 4.097 MB/ s [1000.2 IOPS ] Test: 1024 MB [F: 0.0% (0.0/29.7 GiB)] (x5) [interval=5 of] Date: 09/10 .2015 17:34:01 OS: Windows 10 Professional [10.0 Build 10240] (x64)