I have some additional information:
The backup configuration is:
Category = Lan Backup
Login Method = Anonymous
Type = File
The problem appears to be in the specification of the source. I deleted the original configuration and entered it again. I have always entered the source in the form:
//Nas-Server/Volume_1/
However, with firmware version 1.03, I get the error message:
The URL format is not correct, the correct format is : Volume_1/Test or \\192.168.0.32\Volume_1\Test\test.txt . Please try again.
And the source is changed to:
Volume_1//Nas-Server/Volume_1/
Which is incorrect (and invalid). Has version 1.03 of the firmware forgotten how to perform a DNS lookup?
Does everyone else have this problem?
Jack