The Iomega Zip 750 MB Internal ATAPI drive is a fast and durable storage solution to back up your important data. Iomega Automatic Backup software eases backup, while Iomega Sync software helps transfer files between computers. The drive is capable of reading, writing and rewriting at 50X which makes it a smart data storage choice. It is backward compatible and can read/write 750 MB and 250 MB disks while it can only read from 100 MB disks.