Drive [Q] Internal Storage unavailable for apps, external SD won't mount.

Hello,

Since I have formatted Internal Storage on my Acro S all apps are asking me to insert an SD card.
/mnt/sdcard directory is in place and it redirects to /storage/sdcard0. I can browse it with file managers, but other apps, such as camera won't see it.
Also, /mnt/extSdCard won't appear when I insert SD card, though it appears under /storage/sdcard1.
I have tried installing 3 different roms, but the issue persists.

I googled and searched the forums for many hours, but can't find similar problem or solution.
Please help!