I recently had an email from Abhishek, who was receving this error message on his phone.
“Hard Drive Unavailable”
It didnt appear in the phone when He tried to access it and this all started when he reformatted his phone.
The trick to fixing it as he had discovered was indeed simple.
*#7370# this is a reset of the phone its self and did the trick in this case.
Something i thought might help some folks out there.