Could be a bad stick......
I am from the age of, "Whoa.....a 30mb USB stick.....you know how many 3.5" floppies this replaces!!!!"
First field job.....user PC was Windows NT.....no Frikkin USB support.........sigh........

Today, big USB sticks are like cheap butane lighters......the stick is cheap (make sure to format in correct OS/software) so when not sure, recycle and buy new......