Although Zips can handle up to 100 MB of data, Zip drives need special software, available primarily from Iomega, to be used successfully to back up large hard drives. The backup software currently part of Windows 95, for example, although it sees the drive as a removable device, can't store data across several cartridges. The program stops when it reaches the end, saying 'disk full'. Some third-party products, notably Cheyenne backup software, can also handle Zips but, if you plan to use a Zip drive as a backup device, don't assume automatically that you can do so. Ask the vendor, or check to make sure there's a compatible backup product in the box.
Zip drives can only read and write to their own proprietary cartridges.
Another candidate in the 'inexpensive' category comes from SyQuest. Best known among Mac users, SyQuest has been trying hard to make inroads into the PC camp for some time. The price is comparable, with SyQuest boasting higher speed and, of course, roughly double the capacity. The only drawback to the EZ-Flyer that may make it unapproachable for many PC users is that it has only one version, an external model that requires the presence of a SCSI adapter that will cost extra. Michael Walmsley, a Mac person of my acquaintance, reports that he, at least, prefers the Mac version of the Zip, claiming it and other Iomega products are faster.