This is calculation difference between manufacturer and our PC, please Google 'Memory card capacity' to get more information.
About writing and reading speed ( USB 3.0 reader Test Result) :8GB/16GB/32GB Class 1064GB/128GB Class 10
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: 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
SpecificationsDimensions 0.43" x 0.59" x 0.039" (11mm x 15mm x 1mm)Operating Temperature -13ordm F to 185ordm F (-25ordm C to 85 ordm C)Storage Temperature -40ordm F to 185ordm F (-40ordm C to 85ordm C)Voltage 3.3vWeight 0.05 oz (1.4g)
Package:1 X MicroDive Memory Card with free adapter1 X With Retail Package