Xperia T : warning low internal memory 75% full

[Bacchero]

Hello,

I'am getting a low on memory (75% full) warning sign but looking at the memory usage :

Memory device : 1,97 -> 697 free

Internal memory : 10,85 ->2,79 free

He's asking to move video's, music to sd. Looking at the free/available memory i don't think it's that much of a problem.

Has someone experience with this problem and found a solution.

[TMW22LF]

Despite doing everything Sony advises ie transfer everything possible to SD card, delete messages etc my phone is constantly telling me its memory is 85% full, and often can't action app updates due to lack of memory, other than the usual Facebook and wattsapp, part of which are also stored on SD card, I have little else on my phone other than the apps supplied by Sony Xperia Aqua. Very annoying. Does anyone have any advise. Thank you