Internal HDD

[Jerald]

My HDD wont appear in my computer, and then I check disk partittion it's size became 3.68 GB. But it have 500GB size. It is SATA.

 

[Tmagic650]

Try replacing the drive...

 

[SNGX1275]

How did you check disk partition size if it isn't appearing? Whats keeping you from just deleting the partition and trying to create a new one? Have you ran a HDD diagnostic utility on it? Basically need more information for a proper reply.