Using the GUI, especially Nautilus to copy photos off an Android phone can be really slow, this process makes it much more reliable.

Firstly, find out where the device is mounted.

mount | grep  'gvfsd-fuse'

That’ll return something like the below:

gvfsd-fuse on /run/user/1000/gvfs type fuse.gvfsd-fuse (rw,nosuid,nodev,relatime,user_id=1000,group_id=1000)

You can then cd all the way in to that directory.

cd /run/user/1000/gvfs/mtp:host=SAMSUNG_SAMSUNG_Android_RF8N30TLG3M/Phone