Roland no longer has a replacement for the internal ZIP drive of the G-1000. As an alternative you can use an external SCSI ZIP drive by connecting it to the SCSI port on the back of the G-1000.
Only connect a SCSI ZIP 100 drive to the external SCSI connector.
Do NOT attempt to connect a PARALLEL ZIP 100 drive to the external SCSI connector. Damage to the G-1000 will occur.
It is simple to identify a SCSI ZIP 100 drive. It will have a SCSI Device ID switch on the back of the drive. PARALLEL ZIP 100 drives do NOT have this switch.