The Iomega® Zip® 750MB Drive is compatible with the Zip 250MB disks, which means that it will read files from and write files to the disk. Due to changes in the Zip drive to increase the storage capacity the Zip 750MB Drive will read files from Zip 100MB disks, but will not write files to Zip 100MB disks. The following chart details the read, write and format compatibility between the Zip 750MB Drive and different capacity Zip disks.