I got similar message - found the SD card had come unplugged
IDK, maybe you need to turn it off and then turn it back on again so it can reset itself.
Had the same issue. Facebook was the culprit. Its a memory *****.
Try going to factory settings and the crap might vanish
BECAUSE ITS CRAPPY!!!
you're phone is ****, but mine is too so don't worry
it just wants your love