Package Contents:SAMSUNG Micro SD with Retail Package*1About capacity:64GB = approximately 56GB-60GB128GB = approximately 112GB-120GB256GB = approximately 225GB-238GB512GB = approximately 450GB-476GBThis is calculation difference between manufacturer and our PC,Market Conversion 1 GB = 1.00 billion bytes, computer conversion 1 GB = 1.073741824 billion bytes.please Google 'Memory card capacity' to get more informationTips:How to verify the Capacity and Speed of the memory card?1). Please use quaity 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 ect. Low quality device will 100% slow down card speed, 1MB=1000KB.Please read carefully. Thanks!!!1. All products are 100% authentic, original authorization, general agent direcely supplys.2. The SAMSUNG has three big production sites: China, South Korea, the Philippines! All products delivery randomly. 3. The product has Chinese version and English version, all shipped randomly, please do not worry, all are 100% Original.
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