This card is now unreadable and I have been using it for less than 3 months. I only stored my apps on it and I don't have that many. Sandisk is usually a good brand but, I will not be buying any more cards from them. I bought this memory card in late January and It is past the one month return so I am stuck with an unusable product. I don't use my Kindle Fire that much for reading so I only use it to check Emails or play games. All in all I figure I have used that memory card less than 20 hrs total. The card is a pain to put in and take out. Since I have 8 GB I will not bother buying another memory card.