Package Include: 1* 512GB memory Card with Adapter About capacity: Computers are binary, and other devices are decimal. Therefore, all TF cards may show a few GB less on the device, which is completely normal 512GB=approximately 467GB-489GB Please Note:(① The speed of the memory card is greatly affected by the card reader, adapter, USB port, etc. Please do not use cheap card readers to test the memory card, low-quality card readers will reduce the memory card speed by 100% ②Please set the storage path before use, otherwise the files may be stored in other places instead of the memory card ③Up to 40MB/s read speed; write speed is lower. According to internal testing; depending on the host device, interface, usage conditions and other factors, performance may be reduced. 1MB = 1,000,000 bytes ④ Our Store offers 100% genuine memory card. Please feel free to contact us if you any issue about the flash memory and our service. Backed by 30-day refund and 12 months warranty , giving you worry free use, a pen drive you can count on.Thank you for your coming !