CD / DVD Writer
CD Writer / DVD Writer is a very good option for a backup device. It allows you to backup the contents of your HDD onto a CD-R, CD-RW & DVD-R disc. It also allows you to backup your existing application CD's. As blank CD's are very cheap, it is an affordable backup device.
Like all other PC hardware a CD/DVD Writer comes in various speed. A 32 speed drive can write a full 650MB CD in around 4 mins and a 52 speed drive can write it in around 3 mins and so on. CD-ReWritable's are available in IDE and SCSI interface. You will require a SCSI card if choose to get a SCSI model.
CD / DVD Writer is more than just backup device, you can use it to create your own Audio CD, Photo CD, Video CD etc. You can also use your CD or DVD meida just the way you use hard drive, using the usual drag and drop file copy. Most CD/DVD writers are bundled with software which can perform all the tasks I have mentioned.
Recommended CD/DVD Writer:
Lite-On Super AllWrite 24X SATA DVD-RW Dual Layer Drive
Pioneer DVR-S20L BK Black Internal SATA DVD CD Re-Writer
Asus 24x DVD-RW Serial ATA Internal OEM Drive