Metal USB Flash Drive 256 GB 2.0 - Silver with Key Ring by VOJOASON

I purchased one of this model and at first it worked fine...slow but fine. So I purchased two more. Again, they were very slow when putting files on them. But, then the first one locked up. I tried the next one and same thing. Locked up. I couldn't open any subdirectory. All three failed. No wonder they are priced lower than the brands that work.