How long does it take to download 8tb drive on average?

Debating on getting physical 8–>16 tb upgrade vs cloud.

If I do Cloud is it easy to just install the stuff I want and leave out the rest, i.e wii, wii u, pc games, and leave out imports?

i would buy the drive with the files in them done for your. less hassle and its faster

It entirely depends on your internet speed. Could be as fast as 2-3 weeks or take months.

I've been told that "fast internet" (non-fiber) takes at least a full month, 24-7, uninterrupted. That means no streaming netflix, youtube, etc for a month; and if you try to play your Xbox/PS in that time, you'll get laggy games.

He breaks it into sections though. You can get the core 1tb and 90% of the game systems in 1tb/1week. The other 7tb are bigger game systems like PS2, Dreamcast, etc.