Sometimes, when I plug in my flash drive, it's using USB1.0 driver, instead of USB2.0 driver. Is there any like in Device Manager that I can check the driver information?
Well, it's kind of low-tech but if you copy a file over the wire and get more than 1 MB/sec it's USB2.0. How do you know "it's using USB1.0 driver, instead of USB2.0 drive"? Are you saying you're getting two different messages when plugging in the same drive? Or you're getting one speed on read (fast) and the other speed on write (slow)? If the latter then that's normal and the actual hi/lo speed numbers vary a LOT based of which flash drive you use.