Share your experience!
I hate technology!Boot your device in safe mode:
http://talk.sonymobile.com/t5/FAQ/How-to-boot-your-phone-into-safe-mode/m-p/348008
Can you see the files with file commander?
Strange,something is blocking your files from being indexed and shown in media apps.
That means they are not indexed.Strange thing there.So in safe mode no change?
You can try the procedure again with media storage or you can go for a software repair:
http://www.sonymobile.com/gb/tools/pc-companion/