Got scammed by some ebay seller, and want to fix your hacked key to its default memory to prevent data corruption on your memory stick. Well here is a simple step by step procedure to fix memory of your hacked or fake usb keys.
First lets fix a Memory / USB Key having AU6890 or higher controller/flash chip. I was scammed and was given a Hynix HY27UT088G2M memory which is by the way 1 Gigs space total and not 8GB or anything else. So, lets flash it back to its default 1 GB value and fix this sucker good.
First of all you will need to open up your usb key case, do not worry most ebay keys are easy to open, i opened mine with just my finger nails. Some might need exacto knife or something that will do the trick. Now look at the memory controller chip.
Flip the memory key and look at what memory you actually have on the darn usb key. Here is what I had Hynix HY27UT088G2M :