IOMEGA peerless 10-20
seems to work, I'd think
the 40 makes no difference.
What have you tried to mount it?
and see whether there's any usb-storage
subdirectories ... if there are, check
whether the modules scsi_mod, sd_mod and usb-storage
are present ...
If so, and it's been used by windows (assuming
fat file-system) try
If it displays partition information, use the number
that it has the diskspace allocated to:
mount -t vfat /dev/sda<# from above> /mnt/<your new mount-point>