I’ve just ordered a new MacBook Pro. It’s a Retina MBP, so has a 512GB SSD. Upgrading this is difficult and extremely expensive. So in preparation for the new machines arrival I started freeing up disc space on my current MacBook Pro. I used a useful piece of free software called “GrandPerspective” to visualise what’s using up my disc space. While searching around I came across a bunch of files eating up a huge amount of disc space. These are Adobe Premiere’s cache files. These never get deleted unless you do some house keeping. Even if your projects and media are saved on external drives, these cache files will slowly fill up your system drive unless you select the tick box to “save media cache files next to originals where possible” under the “preferences”, “media” tab. While your there you can also “clean” your cache database to remove older cache files.