in what order to plug an external hard drive into a PC

[jeeswg]

Does it really matter what order you do it in?

This link has a nice picture: 1, 2, 3, 4:
How to physically connect, disconnect, and install a WD external / easystore drive on a Windows PC or Mac
https://support-en.wd.com/app/answers/detail/a_id/12792

[PC]3[PC cable]4[drive]2[mains cable]1[mains]
It suggests (my words):
1 mains cable to mains
2 mains cable to external hard drive
3 PC cable to PC
4 PC cable to external hard drive

And how about unplugging it?

Also, does anyone have any good links on this? It took multiple searches to find a relevant link. Thanks.