At this wattage I doubt it's worth investing in gold efficiency as you won't really see any difference anyways asides from warranty, which, let's be real, most likely isn't going to be used for 7 years.

That said the PSU that you chose is definitely garbage. First of all I don't really get the whole "silent PSU" thing, cause decent PSU should make 0 noise under optimal conditions. It's also non-modular, which will be pain in the ass to cable manage considering the size of your case. I'd suggest something from Corsair, semi-modular ones are quite cheap and reliable.

As Finn mentioned, get an SSD at least for your Windows installation. HDDs are slow, make a lot of noise and are generally quite unreliable in comparison to SSDs.

I don't really know much about AMD processors so can't comment on your CPU and GPU setup, though it looks quite balanced.

ADATA external drives are known to have weak connector points so it probably won't last you beyond warranty period, you might wanna keep that in mind.