Not familiar with Mac networks or systems but I would assume that you would
set up a network share on the Mac and then on the XP machine find and map
the drives just like you would with a Win or Linux network. If you can
share the hard drive on the Mac and see it on the XP box the same would
probably hold true for the removable devices. Remember however that if the
devices are removed, the Mac will probably un-share the devices after they
are unplugged and not re-share them when plugged back in, similar to Win
network shares.