Professionl 120MB/s Brand 64GB 800x CompactFlash Card UDMA 7 CF Compact Flash Memory Card For DSLR<br />Package:<br />1x 800X CF card in plastic case<br /> <br />Speed: 800X<br /> <br />About capacity:<br />64GB=approximately 58GB-60GB<br />This is calculation difference between manufacturer and our PC， please Google 'Memory card capacity' to get more informations<br /> <br />How to perform correct test:<br />Quality Card Reader + Good Computer + H2testw (Do Not Use phone/tablet/SD adapter/computer card slot)<br /><br />Warm Tips:<br />Please use quaity card reader to verify all memory card by H2testw on PC<br />Please don't use cheap card reader to test CF card， speed of CF card will be reduced by low quality card reader<br />The most reliable software to verify memory card is H2testw<br />**CF card speed is greatly affected by card reader， adapter， USB port etc. Low quality device will 100% slow down card speed.<br />**Up to 120MB/s read speed; write speed lower. Based on internal testing; performance may be lower depending on host device， interface， usage conditions and other factors. 1MB=1，000，000 bytes.