Since your MIT Dropbox for Business account is extremely large, you may find your hard drive filling up. Fortunately, you can choose which folders to synch to your local machine. If you choose not to synch certain folders, you will not be able to access them on your computer using the desktop app. You will still be able to access them via your web browser at dropbox.com.
This article assumes you have the desktop app installed.
Selectively choosing what folders to synch between the cloud and your computer is easy once you find the correct area. There are several steps to take to get there.
1. Click the dropbox icon in the system tray.
2. Click the gear icon in the upper right.
3. Click on "Preferences."
4. Click on "Account."
5. Be sure you are on the correct account (Personal or MIT), and click "Selective Sync..."
6. Select the folders you want to synch and deselect those you don't want to synch. It may take a few seconds for all of your folders to show up in the list.
7. Click "Update."
8. Click "Ok."
9. Click "Apply."
10. Click "Ok."
A demonstration of how to selectively synch files on a Mac can be found in this lynda.com video. Selective synch is covered beginning at 1:00. The steps are essentially the same, but the dropbox gear icon is found at the top rather than on the bottom of your screen.