I just bought an epic and am pretty satisfied for the most part. My main problem is that every time I turn off my phone and then turn it on my sd card is "damaged" and I lost everything on it. I bought a spare battery because we all know that the battery life sucks. So when I am ready to change the batteries I turn off the phone, change batteries, and the turn it back on. With out fail It comes back and tells me that my sd card is damaged and I lost everything. This is annoying. What do I need to do to remedy this issue?