I have a home LAN. 4 PCs connected to WWW full time via firewalled cable modem. Each PC has XP SP2 and virus scan and its own firewall (Kerio).

I want to back up all 4 PCs to one big external HD that is run off of the main PC.. I would use the XP provided Backup utility for this from the main PC and scheduling routine backups.

For the Backup utility to work and see files on all PCs, I need to set the entire drive in each PC to "Share"..including the root.

Does this leave me more vulnerable to WWW mischief or is it not enough more to worry about.

thanks!