My 100 MB USB Zip works perfectly well here on a recent iMac. It has model number Z100USBS and is from 2002. SCSI Zips work on the SE/30. But you still have the HFS / HFS+ issue. I use a middle age Mac as an intermediary. Or you could fall back to DOS/FAT (what a shame...) but lose all Mac meta data.
If you understand some German, there is this nice site http://www.knubbelmac.de about classic compact Macs with reference tables showing which AFP versions (http://www.knubbelmac.de/themen/afp-server-vergleich.html) and filesystems (http://www.knubbelmac.de/themen/kompatibilitaetsuebersicht.html) are supported by which Mac OS version.
HTH, bobo68
If you understand some German, there is this nice site http://www.knubbelmac.de about classic compact Macs with reference tables showing which AFP versions (http://www.knubbelmac.de/themen/afp-server-vergleich.html) and filesystems (http://www.knubbelmac.de/themen/kompatibilitaetsuebersicht.html) are supported by which Mac OS version.
HTH, bobo68