Sort of solved...
I left it during the night to copy the mass memory.
In the morning (now) I checked the phone and it was off.
I switched it on, and after few errors it showed the homescreen and, I even have the contacts!
Maybe the OS Restored missing file/s during the restart.
BTW, it showed 0b as free space and now it shows some free space...
Now I make a backup then, Reset...