ZIP DISK 250M, DIS-ZIP250
use the Zip 100MB disks in the Zip 250MB drive.
You cannot use the Zip® 250MB
disks with the Zip 100MB drive. The Zip 100MB drives were not designed
to be forward compatible with the Zip 250MB disks. If a Zip 250MB disk
is inserted into a Zip 100MB drive, the disk will automatically eject.