My 1 Tb external HDD is not seen by my laptop but woks fine on my desktop.
Laptop is running Ubuntu 18.04.2
Desktop is running Xubuntu 18.04.2
HDD also works on Windows and Mac machines, so the issue is with the laptop, not the HDD.
On the Laptop:
lsusb shows the HDD is listed as a device.
fdisk -l does not list the HDD
gparted does not see the HDD either.
USB memory sticks work and automount as expected.
My problem seems a little like this guys problem, but I'm not sure if I understand his solution, or if it would work for me:
How can I successfully mount my external HDD on my laptop?