C4 internal storage 16GB?

[Zhnovia]

I bought this Xperia (C4, or at  the store E3) because it has 16 GB internal storage. But I send to you my screen shots of my phone' s settings..... 

 Thanks! 

[Uliwooly]

@Zhnovia

https://developer.sonymobile.com/downloads/whitepapers/xperia-c4-e5303-e5353-and-e5306-white-paper/

Check page 3 and 5 

The E5303, E5306 and E5353 have 10 GB of free memory available to the user for downloaded applica-

tions and their data, music, pictures and movies while each device has up to 16 GB of flash memory in

total. For more details about memory, see “Memory in Android™ devices” on page 17.

[Zhnovia]

OK. Now I understand. Thank you! I have one more question about that. I send you a screen shot. Why does my phone has a problem? 3GB is not enough free space. (other phones has 500 MB and works well)

[Zhnovia]

I forgot.... 

[Uliwooly]

@Zhnovia

Could you translate what it says? 

also, clear the cache couple of times and check again

[Zhnovia]

What do you want to translate to you? Sorry, but the problem, I think, is obvious, is the red line in the internal storage at the 8GB, and the full is 11GB. And my question is: Why the 3 GB is not enough to my phone to save my contacts or my appointments in the memory? (that problems are happened (in my phone),  they are not fantastic/ypothetical) Other phones work properly at 500MB free space....... 

[Uliwooly]

@Zhnovia

I don't know which apps you are referring to or which message, if you get a message take a screenshot and post it here, also go to 

Settings > storage > take a screenshot > internal storage > take another screenshot 

[Zhnovia]

Thank you very much for your help! So, I send you a picture of my internal storage ( is in the red circle ⭕).  When it red like this and with a '!', my Xperia contacts don't save my new contacts, and my Xperia diary don't save my new appointments. I send you a picture with that applications in red circle 

 So, as you see I found alone the solution to apply Google contacts, and Google diary, because this ones work properly. But now I found out that my Xperia keyboard don't work properly. The keyboard don't save my new words.

[Zhnovia]

Aaaa.... And the numbers of the internal storage is from this application in the red circle 

In English I don't know how to spell it.... 'diagnostic control' make any sense? Do you want another picture from the inside of this application? (the first one when it's open)

[Zhnovia]

Do you want a picture of my settings and storage? I didn't give these ones before. All pictures are from the application 'diagnostic control'