Hi efosamy,
There is one "Disk 1 Removable No media" in your screenshot. What is it?
Can you please remove it and then try to initialise your ext. HDD?
It is always better to have only the problem device connected when we want to troubleshoot.
Next, have you tried connecting your ext. HDD on another PC? And what results?
Also is it a new one or has it been used before?