Use a micro-USB to OTG adapter to plug in a mouse; if the digitizer is dead but the display works, you can still navigate to your files.
If your Lumia 650 still powers on and connects to Wi-Fi, the most effective way to ensure high-quality file preservation is through the native cloud. lumia 650 emergency files high quality
A shielded USB cable to prevent data corruption during large transfers. Software: Overdrive or Windows File Explorer (MTP mode). Use a micro-USB to OTG adapter to plug