I just want one that will change to whatever size as the files inside of it. I decided to move all of my sensitive data into a Encrypted Disk Image, and I just don't wanna waste space but still retain the ability to drop a big file in there and not worry about it. What is the image format setting in Disk Utility, it also has the option os Sparse Disk and Sparse Bundle. Also what partition map should I use? I was using No partition before and just dumping my documents in there. I don't wanna use full disk encryption because with SSDs it slows it down like crazy. I also hate login passwords since I'm always on, and never log out anyways. Thanks for any help.