Reducing Map size, what takes up all that space

[Chaosarmy]

I just made a map of Lotr, the battle of Pellenor fields. With a lot of imported models that I need to use and other imported stuff I am using and the map is very big. 7 MB. I cant host it on LAN or BNET cause it is too big. Are there some ways to reduce the map size without deleting imported stuff?

Much of my imported stuff is sounds, how would I compress them or make them smaller because I think they are the files taking up all the space.

It needs to be under 4 MB to be hosted. Please Help

 

[Murlok]

Its probably because of your models and sounds, you should really lower your map down to under 2MB or very few people on Bnet will play it (or stay for the dl) unless it becomes a really popular map like DoTa and such. As for compression, I have seen people try it but it often messes up or corrupts the map, so if you are gonna try it make a backup fist.

 

[VGsatomi]

Music is usually the biggest space hog. Low-compression skins and loading screen are second. Take a look in my "dos and dont of map making" thread...in there I have some tips on reducing map file size while keeping all your resources intact.
-VGsatomi