SAMSUNG Micro SD Card SDXC U3 4K
Simply the right card
More space and higher speed. Free up your devices with the largest capacity and highest read/write speeds in its class, perfect for 4K UHD video*. With astonishing performance and reliability, lets you save and treasure the richness of life.
Any computer parts have compatibility issues, but Samsung as a world brand,with a good compatibility . if your device is too old, may not be suitable for the latest products
Difference of Factory design and Electronic products to lead a capacity difference , available capacity will be about 90% -93%
Please test by H2testw and use good quality USB3.0 reader , speed is influenced by many different factors , interface, computer condition , test software ,systems ,use , etc .
USB3.0 is compatible with USB2.0, USB2.0 speed will show the lower.