Macworld.com – In the beginningâthat is, 1984âa Mac could store 400K on a painfully slow 3.5-inch floppy disk. Today, your MobileMe membership provides you with 20GB of combined e-mail and file storage spaceâthatâs 50,000 times as muchâup in âthe cloud,â swiftly accessible by Macs and PCs, iPhones, and iPod touches anywhere with a data connection.