For people who are experiencing that kind of problem... If you've rooted your device, you have several things to try to see what is going on exactly. One key

For people who are experiencing that kind of problem... If you've rooted your device, you have several things to try to see what is going on exactly. One key thing to look at would be the 'dmesg' output. If there are a lot of read/write errors to the internal eMMC storage, then that probably indicates a hardware problem. If that isn't happening, and 'logcat' also doesn't show anything suspicious, then maybe do a full backup (like with Titanium Backup). After that, you can try to clear the caches and see if that helps. If you're still having problems, then maybe it is time to try a full factory wipe, which will erase all your data.