I dont have the card in front of me but after format I got around 238GB of usable space which is about right. Only had the card for a few days so I cant say anything about reliability yet. I can say it is the best priced, for the size, from a reputable brand on Amazon at the moment. Ive used Patriot memory cards for many years and have yet to see one fail. Ill update if I run into any problems.