I recently purchased a 256 Lexar stick at a Target store and after my first time filling it up with pictures I got the "Format Error" message just as the other reviewer explained. I was able to eventually download most of my photos, but did loose a few. Luckily, Target took the stick back and gave me a refund. Now, one of the 128 Lexar sticks I bought last year gave me a "Format Error" after taking a photo. Luckily, I was able to quickly delete the picture and it seems to be working okay now. I am not confident in the durability of this stick so I will NEVER buy Lexar sticks again. When you are recording memories, just spend the extra money on SONY. It's worth it! I have two Sony sticks (one two years old and one a year old.) I have NO problems with these.