As Substance said, Importing Stuff is the #1 File size increase of the whole thing.
Next is Music <Imported>
GUI Triggers
JASS Triggers
Terrain
Custom Spells
Other-Placed Units (Loading Time)
This is what I personally think, I could/probobly am wrong.
Music is definitely the top spot on the list of stuff that blows up map size like there's no tomorrow.
Followed by skins, or other graphics like loading screen.
Followed by models.
Followed by smaller imports like icons.
Triggers or custom objects / spells?
Nah... even 500 triggers is nothing to worry about.
As for terrain... well, epic maps need epic size.
Still, 1. you do not really need an epic map, 2. decent terrain is of major importance.
Never worry that you might place one tree too many. Do worry that you didn't place one enough.
Of course, once you hit the destructible / doodad limit, you should stop. Preferably sooner.
Anyway, just forget music. You're the only one anyway with that weird taste...
I'm on a page about incorrect corrections, and spent the better part of like two hours trying to get someone to understand that -5^2 = -25, not 25, and then that post had comments get reposted because that group is self sustaining, and that person was in turn trying to explain what I just explained to them. And I'm taking that as a victory
I will be AFK for a couple of days you guys hold down the fort while I am gone. I will be checking in on my phone but that will severly limit me. Be back saturday!