Here’s some options that I am recommending

1. 1.  Drobo 4 drive unit.  This unit is what they call beyond raid. All you have to do is put 2 drives in this unit to start and they don’t even have to be the same size.  The unit will take care of everything else. As you grow you can add one more drive or 2 more drives.  Now when it becomes full you can replace one of the drives with a larger one and presto you have more space.  The best this is that the drive sizes get larger every year and less in price.  This unit has firewire 800 and USB 2 connections. They even have a NAS attachment that makes it a network drive.  However this is at an extra cost.
   

2. 2.  Retrospect software for you backup solution.  This comes in a 3 user license and up if you  have more computers.  This software is easy to use and will backup from your computer to where ever you tell it to do it. 

If you have any specific questions on the setting up of the unit and software please

email me.  cam@justaskcam.com

I do have a phone support at great rates.

Click here to go to drobo.com

Here’s a hot swapable solution.  I found this on Ebay.

Firewire800 & USB 2.0 dual  bay hardware Raid and it uses SATA II or SATA I drives.  This mirror enclosure has hotswap rebuild.  So if you have a drive fail you can replace that drive with another and it will rebuild the data back to that second drive.  So you don’t have to rely on your computer to do that process.  All you have to do is connect this unit to your computer and save all your data to this drive unit.  Then it does the rest.  For some of you on a limited budget this will give you peace of mind.

You will have to buy the drives separate.

Here’s some links for suppliers and direct link to Ebay seller.