Unable to mount '/data'

Hey guys,

lately i am having some trouble with my Phone.
Story:
I was surfing the world wide web and than turned the phone in standby (with 30% battery). Next morning i tried starting it but it didnt react. So i plugged it in and tried to start it. Everything seemed normal but then animation of the motorola logo lasted like 15 min until i got a blackscreen (phone is still on). I got curious and turned it off by holding the power button for serveral seconds. I tried again turning it on but every time the same thing happened. So i tried to reset my device with the factory reset. But nothing changed. After that i went into recoverymode (Teamwin) and tried to install a ROM and there i got always the same error:

Unable to stat '/data/dalvik-cache....
Unable to stat '/data/....
...
and the last one is always
Unable to mount '/data'

So i googled it and found some solutions:

• Factory reset


• Wiping data


• Format Data

I tried all of this solutions but it didnt seem that something has changed.
The problem is i have no idea how smartphones work and so i dont know what the "experts" are talking about, if i find a forum about this topic.

Does someone know how to fix this and can guide me to a working phone? I dont want to buy a new overprized phone.


Phone details:
Motorola
Model: XT1068
Type: M0FB9