Share your experience!
which app were you using to take notes? where did you saved those notes?
I think it was only one app. But after the day when problem appears i got 2 apps.
It's standart xperia notes app.
You will have to check with those apps and see if you can find them, if they were stored in an SD card, perhaps it got corrupted, or if you use a clean master app perhaps they were deleted.
It's only 1 app when i enter in Menu, but in Settings > Apps are 2.
I do not use any cleaning app. I think the 2MB app is the app that have notes in it, it types it's running( cause button Force Stop is available) and that app have data 500KB of data.