Problem: While trying to import photos and video from your iPhone onto your PC, I kept getting an error message. I would go to This PC/AppleiPhone/DCIM and locate the media I wanted to import. Then I would attempt to copy and paste the media into a folder on the desktop. I got the error message "Device is unreachable."
Solution: I was able to fix this problem by simply changing a setting on my iPhone. If you have the same problem, go to Settings/Photos and scroll down to "Transfer to Mac or PC." "Keep Originals" should be checked, not "Automatic."