Default [Q] Memory Problem

I have a problem with my Neuxs 5.
A month ago i flashed my Nexus on Android L and yesterday i also rooted it.
Then a few hours later it crashes. I don't know why and I can't boot it anymore.

Today i tried to flash it new without a data loss, but the problem is that the apps run all perfectly except for that i can't save anything and could not open the galerie.
But in the settings i can see that there is a memory. Only i can't access on it.

I want the data from the memory, but i don't know how.

I hope you can help me and sorry for my english.