Insufficient Storage Available Error On my android phone- how to fix it

Hello friends,
Me and me family all are using android phones of the known mobile brands in India. And we are pretty much happy in usinhg them. No one at home is pretty familiar with the features of androids they are just using them.
But what I want to know is that all our phones are full of songs and videos But there is still space in SD card even then the fones are showing the Insufficient Storage Available Error.
Does any one know how to fix that?

Thanks in advance.

You can use Free Mobile Helper to move some apps to SD card.

Insufficient storage which means that you are trying to save some application whose required memory is more as compare to the available memory. So, try to make the space available it will help you get rid of this problem.