Subscribe with iTunes | Review on iTunes Want to check how much free space is available on your hard drive? There are several ways to do it, but I am going to give you two - Finder & Terminal. Here is how to do it: Open a 'Finder' window. Look in the bottom of the window, and it will show the available free space, listed in Gigabytes. Need more details? Hope you aren't afraid of the 'Terminal'. Open 'Terminal' Finder -> Go -> Utilities Now, enter in this command: df -g This stands for disk free, and we added the '-g' to show the output in Gigabytes, since it's the easiest to understand. If you want Kilobytes, you can use '-k'. This picture shows the Total amounts of Gigabytes available on the drive, how many are used, & how many are available (free space).