My New Mac, Snow Leopard Edition, 2nd Edition

Chapter 8. Managing and Viewing Your Files and Folders

Your Macintosh stores data in files. To create a file, you need to use a program such as a word processor program, a paint program, a spreadsheet program, or a presentation program. Every time you create a file that you want to keep, you must save it, name it, and specify where it will be stored.

Filenames are for your benefit, so you should choose descriptive names, such as Letter to the Ex-Wife or Tax Returns 2010. You can store files on any storage device or drive, but you'll probably store similar files together in a folder to make it easy to find them when you need them later.

After you've created a file or folder, you can copy or move that file or folder to a new location at any time. ...