Hey guys, i ran WhatSize to see what are the apps that are hogging my computer, and i found that certain data i didnt need are taking up space! I have a few questions. 1) What is this "private" folder with a subfolder called "vm" taking over 1.42Gb? I suspect its virtual memory? And that i shouldnt mess with it? 2) Under Library-> Application support, i realise i have 1.35Gb of Garageband loops which i never use! Is it ok for me to directly delete this folder? And if i do need it back (for whatever reason), will i be able to retrieve it by reinstalling Garageband from the Apple installation CD? Also, will garageband continue to work? 3) I've got 1.5Gb of Printer stuff also under application support, and most printers i never use! So can i delete that as well safely? 4) Also Library-> Appplication support -> Audio -> Apple Loops -> Apple loops for Garageband...... over 2Gb of loops! again?? This is weird, i have 2 folders of garaband loops. Can i delete this safely? 5) If i delete World Book 2005, can i retrieve it back should i need it again, from the Apple CD given to me when i bought my iBook? Its taking over 1.35Gb and i rarely use it. 6) Lastly, what are Quicktime caches? Its over 100Mb in, Users->Myname -> Library -> Caches -> Quicktime. THANKS for answering these questions!!! Ive only got like 720Mb of hd space left out of a possible 40Gb, and last ive read, i *should* have over 4Gb of free space to enable osx to be as responsive as possible!