[Q] Anyone downgraded from 5.0.2. to 4.4.4 topic

Hello, I have upgraded to 5.0.2. via OTA a few days ago. My phone was RetEU .23, and the update notification that 5.0.2. became so annoying, so I decided to give it a shot. Lollipop is a disappointment for me, battery drain issues, lagging all over the menus, slow dialer, the phone was running better with KK installed, so I want to return back to 4.4.4.
Unfortunately there is no clear opinion whether this could be done, some say that when you have 5.0.2. bootloader installed with the OTA, you cannot go back, others say that it is no problem to do so. Really confusing.
Anyone tried to go back to 4.4.4. after getting the OTA? Could you please share how did you do so? Unlocking the bootloader and flashing one of the 4.4.4 stock ROMs from the General Section?

Downgraded to KK from Lollipop, can't access SD anymore topic

Hi. Sorry for my bad english.

I wanted to try lollipop, so did a nandroid backup of my stock 4.4.2 Touchwiz KK (using Philztouch recovery) and flashed official 5.0.2 blispop rom for my device (Samsung Galaxy Note 8 N5110). After a few days I decided to roll back, wiped all, restored backup and everything fine.

Except... now I can't access internal SDcard anymore.

Weird thing, it deppends on the app. Some can access, some can't. Examples:

Stock file manager ("mis archivos") can R/W SDcard normally.
But ES File Explorer can't. Internal storage appears empty, and if I try to put any file it says I don't have permissions.
But Root Explorer can.
Chrome & stock browser can't. If I try to download any file, it fails (it says it hasn't permission to create folder).
I have a mp3 there. If I try to play it, many players (Google play, VLC, etc) fails, but stock music player plays it normally...
And so on.

¿Any ideas to fix that issue? Thank you very much.