Some info about my problem:
~This all started when i took my ext. micro sd card 16gb and put it in my old phone ( sony ericsson: aino )
~When i unmount, or remove the sd card the problem goes away.
~ I 've tried clearing cashe and data of almost every single app , plus i deleted the contents of my ext. sd card no change
~Also i sometimes get the 'Unfortunately, Google+ has stopped.' message. Don't know if it's related, though i never got it before.
Any help would be much appreciated.