All computers can access NAS, NAS can't access anything.

You need to simplify your setup as much as possible to eliminate potential conflicts and sources of issues.

1. Completely disable the firewall on one of your XP machines - not just within the workgroup - turn it off completely. You can re-enable it one backups are running and so test if that is the source of your issues.

2. In your frontview backup job
- Setup Windows/NAS (Timestamp) as the source
- Set host to be the IP address of the PC being targeted (Names can be used, but we're simplifying for the moment)
- Set the path is just the sharename to be backed up (I'd suggest a small data set for the moment, but you can use "C$" - without quotes - to target the full C volume)
- Enter a windows username and password of a user that has full access to that share - use your admin account to be sure of access

You should end up with something like this:



See if that works for you - I just set up the above on an NV+ running 4.1.7 against a fairly new XP installation and it worked perfectly first time as follows:



So if it doesn't work for you - please post your exact error, and post screen shots if at all possible.

If it does, start changing settings one at a time and rerunning the backup after each change until you figure where the problem is