micromax yureka after Lollipop upgrade data transfer from mobile to laptop not working . Laptop is unable to detect the device
Download drivers from the official support site and install on your computer. Go to phone settings and search for USB connection mode. Set to mass storage. Connect to your computer via USB. You could also smuse Yureka PC Suite to transfer data. Google for that, install. It will install drivers automatically and your device will show up.
If it still doesn't show up, try another USB port.
Still no? Try on another computer with the software and drivers installed.
Otherwise, contact support.