Okay, so I was reading through the manual and I realized that I can actually remove the back cover and install a MicroSD card. I just assumed that this thing was sealed up. I tried to remove the back cover but I keep getting nervous because I'm placing a lot of pressure on the device but it won't come off. Is this normal? Do I just keep pushing until it comes off? Is it downward pressure into the device that I need or do I just push straight up? And I guess I could use clarification, it is the TOP of the device where the camera sensor is at that comes off right? Not the bottom where the cable plugs in? I'd just like some confirmation that I'm on the right track before I accidentally break this thing.