Ive had the card for over a month, using it in my Samsung Galaxy Note 10.1.I filled the card with a few TV shows and movies to watch on the go, as well as many PDFs and MS Word Docs.The MS Word and PDF files often get corrupted after use. THe larger files seem to stay intact. I moved the smaller files into the internal storage and havent had problem since.Im hoping Sandisk has a decent return policy.