This happens to me at least once per day. I feel the phone getting very hot near the bottom. Almost too hot to hold and it's in a case! I turn the phone on and it shows that my battery has drained like 13% in 40 minutes when the phone was supposed to be sleeping. When I look in GSam Battery Monitor it shows that the phone was actually held awake the whole time and that the battery was all consumed by the "System (sdcard)" and "Media" processes. Since I first noticed it, I've managed to catch it happening and use Elixir to view more detailed info about the process. Turns out it's the "Security Storage" process and it's definitely using the CPU to do something. The problem is, I have no clue what it's doing and why so I don't know how to prevent it. The included packages are com.android.providers.security, android, com.google.android.backup, com.android.providers.settings. I've attached some screenshots showing the info from GSam and Elixir for a specific time when it consumed 13% battery in 40 minutes when the screen was only on for 8 minutes but the phone was held awake for the other 32 minutes by this process running. On a related note, I've noticed a few times that it's happened after I've unplugged the phone from the USB cable attached to my desktop computer (running Windows 7 64 bit). I'm not sure if that has something to do with it? I haven't done anything while it was plugged in, just charged it. Any help or advice is greatly appreciated! Thanks!