When I had an A3000, zorro2 ethernet cards like Commodores a2065 were the most convenient way to get things off the net servers. Null modem (serial) and parnet (parallel port) cables to another machine were another popular alternative. SCSI to SCSI setups were also possible. The most practical solution to get lots of data to an A3000 is probably to find an old scsi CDROM drive and appropriate filesystem software setup for the A3000.
