Are you having issues saving on your internal memory and you have hard reset and wipe your phone and still the same problem.
browsers can't download on internal storage
WhatsApp can't download media on internal memory
installed apps can't download prerequisite files because they can't write on internal storage. its extremely frustrating for users of kit kat 4.4

solution to the problem
1. First you must have phone rooted, any method will do. I used kingo root for mine because all other rooting ways didn't work (am running ezkat 4.4.2 on my note 2 T889)

2. go to play store and download terminal emulator

3. After su and terminal emulator have been installed, open terminal emulator and input this lines only without the parentheses

"su"
then it says permission has been granted, now enter the next command

"restorecon -v -R /data/media"

it will write some jargon, restart your phone and whala your issue is fixed

I got the step from forum.xda-developers.com and it worked on my galaxy note 2 running stock rom