I had a question recently about the difference between a flash drive and a Zip drive. Both are removable storage devices. The Zip drive was launched in the mid-1990s and used a Zip disc that was capable of holding between 100 and 750 MB. That was a huge drive back then.
A zip drive required an external zip drive that plugged into the parallel port or it could be built into the PC. Zip drives were fairly expensive and by 2003 had been pushed out of the way by recordable DVDs and USB Flash drives, like the one shown below.
Flash drives plug into the USB port of your PC and hold much more data than a Zip drive, typically between 4 and 128 GB at a fraction of the cost and no need for an external drive. Zip drives have been discontinued, but you can still occasionally pick up the disks online.