FixFakeFlash – solution Alcor controller (chip set not mentioned) identified with VID = 058F PID = 6387, fake flash drive. The drive tested and repaired was from eBay Fake Flash Seller chaiching28. Advertised as 16GB, it’s true capacity was 4GB. This fake flash drive can be repaired using the following information.
Read About VID PID Repairing Counterfeit Flash Drives – Steps To Succeed before proceeding to solution.