Yesterday I began having this problem with my ZTE Engage. It really freaked me out, needless to say. Anyhow, I would turn my phone off and on, and it went away for a bit, then came back. This morning, I see it's back again, I googled the problem and found several sites discussing it, including this one. Reading all of your posts made me think that I would need a new phone/sd card. And that I had lost all the photos of my kids and husband. After trying many of the above suggestions with no luck, I took out the sd card for the millionth time and thought, maybe I should try the old video game console trick lol. You know, where you blow into it to get the dust out. At least that's what me and my brother did when we were kids with Super Mario. So I took out the card, blew on it, blew on the inside of the phone. Put it back in and poof, it's fixed. Hasn't happened since! Weird, I know. So after that, I immediately did a data back up with cricket, and uploaded all my pics to photobucket. I hope this helps someone! Goodluck!