Is something up with Lexar?

So I tried to use a 64GB Lexar USB. My computer (Kubuntu) wouldn't detect it.

I also wanted to check what (if anything) was on my 16GB one and it didn't work.

I tried another USB port, didn't work.

I tried another computer (also Linux) didn't work.

I complained about this to my friend, and he also had a Lexar USB stop working (on Windows).

What the hell is going on with Lexar?