Why is my file 183mb?

I have a file with a column flanked by a 50s screen on either side that I modeled. I have about 18 different variations of this model copied within the file. Even so, why is it so big at 183mb? I tried loading it as a block linked insert, but then it wouldnt show up in perspective mode and I had to explode it to view. Not sure what to do to bring this file down to a reasonable size? Anyone have a solution?

Can you send the file to tech support please?

Here it is… over 150mb now

You have to use dropbox or something of that nature. The file is too large to be attached to your post.