I'd really consider getting an internal installed. Unfortunately you can't do it yourself, because fostex didn't install the connectors on the machines sold with out drives.
But once you have them install the first drive (2.5inch notebook), you can swap internal drives yourself. Probably cheaper than the cost of jazz disks anyway. Maybe use the jazz drive for backup.
Orb drives look good in theory: Some people here have had good luck with them. Not me. One ate my songs, the next started on fire. (I got my money back)
It seems to me that the ssci connection sucks on the fd-8. The only drive that fostex actually approves is a mac formatted zip 250. So much for media independent. Actually I bitched so much and over a period of months, that fostex actually installed my hd for free, so I can't complain.
Good Luck
-Jett Rocker