I've been using two external DVD drives for about 10 days. Last night my Windows 10 laptop stopped reading one of the drives. I thought that maybe I got a defective drive so I tried the second drive and that didn't read the DVD either. One of the drives has USB ports and SD cards slots and they seem to work fine. I connected the drives to my other laptop with Win7. Both drives worked on that laptop. Any idea why this would be happening?