Zip drives are medium-capacity removable disk storage system. This technology was introduced in the year 1995 and became very popular as a transportable, rewritable storage medium. It was popular because of its software that can catalog the disks and lock the files for security. Earlier it had a capacity of 100 MB, but with the new and the latest versions coming in the market it has been increased up to 250 MB and then 750 MB. The various features of zip drives are as follows; they are write protection, media access protection and error protection. It has an internal zip drives and an external zip drives. The internal zip drives adds to the computer's memory storage, it backs up files; it runs software from your Zip disk. Zip drives have been made with a variety of interfaces to the computer. Different types of zip drives are ZIP 100 drives, JAZZ drives, and 250 ZIP drives. There is also a variety of external zip drives with an usb interface, it is called as usb external zip drives. This type also has the same qualities and that is it's an easy way to protect, back-up and transport your important files. Durable, portable Zip disk is easy to take wherever you go. The only thing required to be done is that simply drag and drop your files and they are protected from system crashes or virus.