When you download programs from the Internet, most put an icon on the desktop for easy retrieval and installation. Once installed, though, those files are no longer needed and can be deleted. Here are some common file formats and icons to look for:
· Disk Drive Icons--These icons are left by installation packages. They should be dragged to the trash once the program is installed.
· .dmg—Indicates a disk image file. This file usually appears after the downloaded file has been decompressed.
· .sit or .sitx—Indicates a StuffIt file, the standard Macintosh file-compression format.
· .tar—Indicates a tape archive file, an older Unix utility that combines several files into a single icon to simplify file transfers. These files are not compressed.
· .gz—Indicates a gzip file, a standard Unix compression format.
· .tar.gz or .tgz—Indicates a compressed archive of files.
· .zip—Indicates a winzip file, a common compression format for Windows computers.
You might also run across other file types including Arc (.arc), Arj (.arj), BZip (.bz), Compact Pro (.cpt), LHa (.lha), Rar (,rar), and Unix Compress (.Z), although these file types are less common. You can safely delete all of these files. However, if you paid for the software and you want to keep it in case you have to reinstall it later, or you don’t want to have to download it again, save the .dmg file.
Tip: You can trash any files or folders that say Installer on them (as long as they’ve been installed).