Theoretical peak speed: reads 160MB / s (Class 10 )
According to Western Digital or other related companies internal testing, the speed will be based on the use of equipment, interfaces, and the use of different factors such as environmental change.
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 memory card, speed of memory 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.
According to Western Digital and related companies internal testing, the speed will be based on the use of equipment, interfaces, and the use of different factors such as environmental.Not all memory cards can achieve the highest peak.
About Real Capacity
32GB = approximately 28GB-30GB
64GB = approximately 58GB-60GB
128GB = approximately 119GB-120GB
The ex-factory capacity of Memory Card products is calculated as 1MB=1000KB and 1G=1000MB.
The operating system USES binary algorithm, namely 1MB=1024KB,1GB=1024MB,
Therefore, the display capacity of Memory Card products is about 90% of the nominal capacity, which is a normal phenomenon.
The nominal capacity of the memory card is 8GB, 16GB, 32GB and so on. The actual capacity is about 7.2gb, 14.4gb, 28.8gb and so on.
About Read-Write Speed
Because computer configuration, file type, file size and the number of files copied at the same time will directly affect the actual speed.
Therefore, the memory card in the actual use of speed are different, is a normal phenomenon, not a quality problem.