[DETAIL] About capacity: 32GB=approximately 28GB-30GB 64GB=approximately 58GB-60GB 128GB=approximately 115GB-119GB 256GB=approximately 230GB-238GB Main Features �� Class 10, high quality crystal, durable, waterproof and temperature resistant �� 32GB/64GB/128GB/256GB U3 read speed up to 100MB/s, Write speed up to 80MB/s �� 32GB U1 read speed: 35-50MB/s, Write speed: 10 - 20MB/s 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. [ATTRIBUTES] - Hign-concerned Chemical: None - SD Type: microSDXC - Application: High Speed Read and Write,MOBILE PHONE,Tablet,NOTEBOOK,Tachograph,Camera,Monitoring,Speakers,Digital Devices,Robot,UAV,File Storage,others - Hign-concerned Chemical: None - SD Type: microSDXC - Application: High Speed Read and Write,MOBILE PHONE,Tablet,NOTEBOOK,Tachograph,Camera,Monitoring,Speakers,Digital Devices,Robot,UAV,File Storage,others - Application Performance Class: A1 - Video Speed Class: V30 - UHS Level: U3 - Class Level: C10 - Package: Yes - Type: TF / Micro SD Card - Brand Name: Kodak - Origin: Mainland China - Certification: CE,FCC