SanDisk SD Card SDXC UHS-I Class 10 170M/S Memory Card
SanDisk Extreme Pro SD Card
*Shot speeds up to 90MB/s, *transfer speeds up to 170MB/s * [Requires a compatible device capable of reaching such speeds, such as the SanDisk SD UHS-I Card Reader (sold separately)]. *Based on internal testing; performance may be lower depending upon host device, interface, usage conditions and other factors. 1Mb=1, 000, 000 bytes. X = 150Kb/sec
Steps to verify the Capacity and Speed of the memory card
(1). Please use quality USB 3.0 card reader to verify all memory card by H2testw on PC. Real memory card should pass H2testw with no error. (2). Please don’t use cheap card reader to test Micro SD card, speed of Micro SD card will be reduced by low quality card reader. (3). Micro SD memory card speed is greatly affected by card reader and the capacity you choose , USB port etc. Low quality device will 100% slow down card speed,1MB=1000KB.
About real capacity
8GB = approximately 7.4GB-7.6GB 16GB = approximately 14GB-15GB 32GB = approximately 28GB-30GB 64GB = approximately 58GB-60GB 128GB = approximately 119GB-120GB 256GB = approximately 238GB-240GB It is calculation difference between manufacturer and your PC, please Google ‘Memory card capacity’ to get more information. Your PC says 1GB = 1.073741824 Billion bytes where Market Defines 1 GB = 1.00 Billion bytes.Difference of Factory design and Electronic products to lead a capacity difference , available capacity will be about 90% -93% The pursuit of the perfect person is not recommended to buy.