Solaris 8 - how to format external USB hard drive

I am running Solaris 8 on a SunFire 280R.  I have attached an external USB drive, but the "format" command will not recognize the external USB drive (Acomdata RocketPod).

Here are the USB drivers that are installed:

bash-2.03# modinfo | grep usb
 88 780fe000  116a9   -   1  usba (USBA: USB Architecture 1.25)
 91 78116000  15c55   -   1  usba10 (USBA10: USB 1.0 Architecture 1.)
147 10336511   923e  54   1  scsa2usb (SCSA to USB Driver 1.2)
148 78194000  20b0b 258   1  usb_sd (USB Disk Driver 1.1)
bash-2.03#

In the dmesg, it appears the 280R "saw" when the USB device was attached:

May 16 16:13:08 hashipaa03 usba: [ID 855233 kern.info] USB-device: hub@2, hubd0 at bus address 2
May 16 16:13:08 hashipaa03 genunix: [ID 936769 kern.info] hubd0 is /pci@9,700000/usb@1,3/hub@2
May 16 16:13:08 hashipaa03 genunix: [ID 408114 kern.info] /pci@9,700000/usb@1,3/hub@2 (hubd0) online
May 16 16:13:09 hashipaa03 usba: [ID 855233 kern.info] USB-device: storage@1, scsa2usb0 at bus address 3
May 16 16:13:09 hashipaa03 usba: [ID 349649 kern.info]  DMI, USB2.0 Storage Adaptor, 269S0E2182
May 16 16:13:09 hashipaa03 genunix: [ID 936769 kern.info] scsa2usb0 is /pci@9,700000/usb@1,3/hub@2/storage@1
May 16 16:13:09 hashipaa03 genunix: [ID 408114 kern.info] /pci@9,700000/usb@1,3/hub@2/storage@1 (scsa2usb0) online
May 16 16:13:09 hashipaa03 scsi: [ID 193665 kern.info] usb_sd0 at scsa2usb0: target 0 lun 0
May 16 16:13:09 hashipaa03 genunix: [ID 936769 kern.info] usb_sd0 is /pci@9,700000/usb@1,3/hub@2/storage@1/disk@0,0
May 16 16:13:09 hashipaa03 genunix: [ID 408114 kern.info] /pci@9,700000/usb@1,3/hub@2/storage@1/disk@0,0 (usb_sd0) online


What is the process to format this USB drive so I can begin to store data on it?

My goal is to copy /export  (on the 280R) to the USB external hard drive.

Please let me know what other information :) Thanks for your help!