I believe there was an issue with some of these phones having an emmc prone to failure, I hope this isn't your case. As of right now you have a shipped bootloader and a stock recovery so there may not be too many likely fixes, did you every root it?
I would try to see if cache may be corrupt to start
fastboot erase -w
Note this will wipe all data from phone if your bootloader even allows for the command. If not then your next step you will have to look for an RUU for phone and try to flash this, I would advice to seek the glacier forum here on xda
Best of luck!
Sent from my Nexus 7 using XDA Premium 4 mobile app