The files from my android device get detected only when there is an internet connection. If I am not connected to internet I get an error message: "Unable to mount folder. The server for this folder could not be located." I can open my files (device will get mounted) once I go online on my system. Please help to fix this. I want to connect my phone without going online.
sudo add-apt-repository ppa:langdalepl/gvfs-mtp sudo apt-get update sudo apt-get upgrade
Source: Enable MTP-Support on ElementaryOS
Keep in mind that this is a workaround and that the guide is written 2013.
I asked a similar question here: How can I get Noise and Photos to recognize my phone? maybe it will help you out. I was able to get my Galaxy s6 to work (except for Noise).