Question [Q] Problem with the internal storage of Galaxy Fame

Hello guys, someone can help-me here?

There are some days I'm having problems with my phone.

every time I'd install an application it gave the error message "no storage space" but HE WAS VERY AVAILABLE SPACE!

I opened the app android assitant by chance and saw this:

i.imgur.com/mLTwWyF.jpg

Now i ask: WHY THIS HAPPEN?

Please help me!

Thanks for listening.