Neither Nautilus, Caja or Thunar show my removable storage device in the list of devices.
I can mount it manually using udisksctl:
$ udisksctl mount --block-device /dev/sdd1 Mounted /dev/sdd1 at /run/media/user/RECOVERY.
It shows up in gvfs:
$ gio mount -l ... "Drive(4): Generic Flash Disk
But gvfs can't mount it:
$ gio mount -d /dev/sdd1 gio: /dev/sdd1: No volume for device file"
Nothing I've tried seems to work.