It all adds up to a lot of information on your computer's hard disk. This information needs to be archived, backed up and transferred, and this is where removable storage comes in. Security - It's not practical to lock up your whole computer if it contains sensitive or personal information, but it's easy to lock a disk in a safe. Backup - Computers crash and hard disks fail, and that's how it's going to be for the foreseeable future. To protect yourself against losing information on your computer's hard disk, it's very important to regularly make copies of it.
Music files can be several megabytes, and video files can take up hundreds of megabytes.
Music - With the rise of MP3 on the Internet, it's quite easy to download songs from the Internet or copy songs from your existing music CD collection onto your computer. This can take up a lot of space on your computer, so by moving this files onto external media, you can save space on your PC's hard disk. With a CD writer, it's also possible to make your own music CDs, which can be played on most music CD players. They work like a floppy disk drive, except that they can store a lot more information. The most widely used is the Iomega Zip.