I have been using Elementary OS for one year and everything worked fine till last Friday (May 17 2019). Now, when I plug a usb key or usb hard-disk, the media does not mount. What has been changed in Elementary and how can I go back to the previous configuration? Thanks
Oops, the problem was not coming from Elementary but... from Windows. I mounted the device manually with sudo mount and it says: The disk contains an unclean file system (0,0). The file system wasn't safely closed on windows. Fixing.
It was the same problem for both my usb-key and my hard-disk. Now everything works fine as before.