I have used a Subway before I got the Spider, I use an Olympus digicam & a Hewlet Packard Deskjet 5550C. Both work fine.
Recently, I can also use an 80GB hard drive, 10gb formatted FAT32 & 70Gb NTFS, although that is only read only.
Just make sure you have the latest version of Poseidon (currently 3.6) available from Chris Hodges (
www.platon42.de)