Is there a way to see what is taking up space on my hard drive?
Download and install SpaceMonger. This utility gives you a summary of what files are taking up space on your hard drive, by grouping them together and displaying their relative sizes.
There is a free version available that will give you this information, but you can also opt to download the commercial version, which includes a range of extra functions.
Go to this website for both — Version 2.1.1 at the top of this page is the commercial program (it has a 30-day free trial though), but to download the free version, you have to click on the "Free Software" tab on this page and scroll down to "SpaceMonger v1.4.0" and download that one. The instructions below are based on version 1.4.0.
To view what is taking up space on your hard drive: