This is calculation difference between manufacturer and our PC, please Google ‘Memory card capacity’ to get more information.
About writing and reading speed ( 2.0USB reader Test Result) :
4GB class 6 SDHC
8GB/16GB/32GB class 10 SDHC
64GB class 10 SDXC
Class 6: Read speed around 15-20MB/S ,Write speed around 6-8MB/S
Class10: Read speed around 15-30MB/S ,Write speed around 9-12MB/S
1.The Micro SD card speed is based on internal testing; performance may be lower depending on host device, interface, usage conditions and other factors.
2.Micro SD card speed is greatly affected by card reader, adapter, USB port etc. Low quality device will 100% slow down card speed.
Original high quality flash memory
Manufactured in Taiwan
Assembled in China
? High-speed read and write
? Capacity: 4GB 8GB 16GB 32GB 64GB 128GB
? Compliant with the SD Specification Version 2.00
? Versatile when combined with the adapter, can be used as a full-size SD card
? Compatible with host devices; not compatible with standard microSD-enabled device/reader
? Reliable 5year Warranty
? Dimensions 0.43″ x 0.59″ x 0.039″ (11mm x 15mm x 1mm)
? Operating Temperature -13? F to 185? F (-25? C to 85 ? C)
? Storage Temperature -40? F to 185? F (-40? C to 85? C)
? Voltage 3.3v
? Weight 0.05 oz (1.4g)