Each computer needs to be backed up. The frequency depends on the usage. Computers used for administrative purposes should probably be backed up daily, while others may need only monthly backup. After the initial backup of all programs and data, only the data files should need to be backed up. These may be kept in a sub-directory for ease in doing this process.
Tape backups are capable of storing more information than disks.
The software program disks and other critical program disks should be stored in another location away from the computer in case of water or fire damage. All disks should be labeled with the program name and version. Your computer and disks should be checked periodically for viruses. The Library has a disk to scan for viruses. Check with the Media Center for assistance.