Archive a folder Open the Disk Utility app that came with your Mac. Choose File then New Image and lastly Image from Folder. Then pick a folder with all of the files you want to save to the DMG.

You can't delete individual files from a CD-RW disc on Windows XP, as Windows XP does not support packet writing. Packet writing is a technology that writes data in small blocks to the CD-RW disc.

If you've ever downloaded a DMG file from a website, you've dealt with a disk image. Disk images are a kind of virtual disk--like a CD or DVD or even a hard drive. They store files in a way that ...