I have used Iomega products at various times over my entire IT career, from the original 40 MB drives to the 1 GB versions.
The problem is that you accumulate these disks that a year later become USELESS! And many of the units had serious contamination problems (ie dust and smoke).
Every version is double the capacity of the previous, and many times are incompatible with the older drives.
Hard drive capacities have continued to increase at such a rate that the removable drives quickly become far too small to keep up.
How many of these cartridges would it take to back up a decent video or programming workstation with a 500GB hard drive?
Plus the price is now utterly ridiculous. $600 for the drive with one cartridge that stores a pitifull 70 GB?
Just buy an external 250 GB drive for about $100. If you need more, buy more than one. For the same price i could purchase 6 external drives (all of which i could attach at once!) for a total of 1.5 TB!!!
Or even better, buy an empty USB external drive case and buy a decent drive (maybe the exact same one as in your PC), then when your needs increase... buy another drive and replace the one in the USB case.
Then if you have an issue with your PC, you can replace the PC's hard drive, and reimage back from the external drive (or even just swap the drive from the external case! and then backup to another new drive).
In conclusion, as a serial VICTIM of IOMEGA's external cartridge drives for about 15 years at serveral jobs, I believe these are just about the worst waste of money in the PC hardware market.