OshkoshJohn 0 Newbie Poster

I have two external hard drives, both Maxtor (One Touce 250GB and One Touch III 300GB) and suddenly neither one will appear in the Windows Explorer. They are both present in the system information window. Still odder is the larger of the two is set up to be synced with folders on the two internal drives, and this feature is working! I have tried installing them as both USB 2 and firewire, with the same results. Help!