Why is my external DVD USB drive not being recognized by lenovo y50 laptop?

Most people who ask about why a usb device is not recognized do so because they think that when they plug such devices in that a particular thing will take place. Actually, nothing happens at all unless the autoplay options in control panel are set to cause the device to open automatically. You may only hear the connection sound. Go to "computer" and look for the DVD drive after you hear the sound. Click to open it. Of course, if you are trying to actually play a DVD movie then you will have to have suitable software. A DVD drive set to autoplay will open an options box when you click on the drive in "computer".i