After disabling Media Storage my Lenovo A328 doesn't save pictures, play music, videos etc?

I have rooted my phone and deletes some system apps. I probably deleted something important because a message started to pop up "Unfortunately android.process.media has stopped." I searched for solution and I disabled Media Storage app. Now the message doesn't pop up but I'm not able to take any pictures, play music or even to change my ringtone. What to do?

Re-root the phone.

We don't know what you deleted, either. You're right, you "deleted something important". Without the android.process.media process running, the phone has no way to deal with any pictures, play music or change the ringtone.

Pictures, music and other audio - including ringtones - are "media".

It is rooted phone, suggest to pre root the phone again. If it still not work then just remove the root mode, but If you are a smartphone user, do install Leo Privacy Guard 3.0, Its free available in both iTunes for iPhone, and android's PlayStore, the best security app.