Thank you for purchasing the Samsung EVO Select microSD Memory Card.
I am sorry to hear that you are having difficulties with the memory card you purchased and suspect is may be counterfeit.
Please know that it has come to our attention that counterfeit Samsung microSD cards are circulating in the open market, many of which corrupt files, show slow speeds and drastically reduced storage space, have short lifespans, or simply do not work.
Please contact Samsung Customer Support toll-free at 1-800-SAMSUNG and a representative will gladly assist you with troubleshooting and determining the authenticity of your card, or with warranty service.
Support hours are from 9AM - 12AM EST (Mon-Fri) / 9AM - 9PM EST (Sat).
Samsung Customer Support can also be emailed at: firstname.lastname@example.org
Direct LiveChat with our Memory Team is available 9am-9pm EST (Mon-Fri) at: https://www.livehelpnow.net/lhn/lcv.aspx?d=34834&ms=&zzwindow=0&lhnid=29783
Samsung takes the sale of counterfeit products very seriously. If you discover that you have received a counterfeit memory card, please let me know from which seller you purchased the item and when. If possible, please also post photos of the item to your review. I would recommend that you contact Amazon to inform them of your purchasing experience.