Seller: Flashwoife The performance does not correspond to an SDHC Class 10 card Writing Tests with 2 to 700MB file, result = 5MB / s max against 10MB / s mini warranty (tests with 3 different card readers and 2 PCs with FAT32 formatting and NTFS). Returned item! note: this has nothing to do may be but the design of the card is different from the manufacturer on its website.