Like everyone said - an external hard drive is the only way to go. Here's the rest of the story... get some specialized software to back up your data automatically - I use Safeworld Easy PC Backup - it works great. Here's another VERY IMPORTANT thing to know - make THREE seperate backups - not just the same one rewritten over every time - why ? Because if you are backing up your computer, and as luck would have it, your computer dies, you could have an useable backup file - if you have luck like mine, that will happen. Instead, back up your files Mon, Thur, Sat, for "backup one", then Sun, Tue, Fri, for "backup two", and Wed for "backup three." If worst comes to worst and your computer dies during backup, you still have two recent backups only a couple of days old to fall back on. I worked at IBM for a while - they know backup. If you are really paranoid (like me) copy your hard drive using software - I used "Copy Commander" to do an exact carbon copy. Your hard drive will die - it's just a matter of when. When that happens, you swap cables and you're back in business. And finally, for the super paranoid (me) I use 3 computers networked, and save copies of my main folders on each computer. If any one computer goes down, work continues on another - no problem. This costs a bit more for "network licenses" for software - but I'm running a business here. My business does not rely on one little computer. I also have a laptop. With computers, there is one rule - you pay. If you are prepared, you pay now - if not, you pay later, and much more dearly - but you will pay. Put things on your terms - not a weak hard drive or power supply. Sorry this is so long - but this is THE most important information you need to know to run your business. If you don't follow this, you'll be out of business some day - and then you'll learn the true meaning of - you are gonna pay. I also back up to archive CD's and store them - on site and off. Plan B - buy Vault and give those putzs money they don't deserve...