Sorry, SnickZ, but you didn't understand my question at all. I don't need to know how to clean up the drive a bit by deleting things and emptying the trash, I need to MIGRATE many, many document files OFF my MacBook Pro entirely and put on an external drive. I don't want to delete these because they are important and documents that I've paid for either classes, books or paid articles, etc. but rather TRANSFER OFF the MBP to the external drive so that it makes a huge difference in the GB left on the MBP. I'm talking about using a 2T external drive and removing at least 300MB from the computer to the drive PERMANENTLY. That's what I need to know how/if it can be done. Thanks!