You hard drive can crash or die completely at any time. Never keep only one copy of any of your files.
Even if you have a warranty, a warranty will not get your files back.
How to Make Backups
External hard drives are ideal for backup. Most come with pre-installed, free backup software. If not, use Google to help you find backup software to fit your needs. Additionally, consider making redundant backups of chronologically archivable data (such as photos form years past or school work from previous semesters) onto DVDs as well.
Windows Backup Software
Mac Backup Software
Server File Storage
All students and employees have storage space on our servers. Files stored on the servers are backed up automatically, so it is far safer to store your files on the server than on your own hard drive.