The situation is as follows - there are two 8 Gb ShareSpaces on the same LAN and both have the same data - one is used as the production storage and the other one is the backup storage. Is there any way to perform a one way sync of the DataVolume without using a PC/Mac ?
That would be tricky at best. If you have a USB device connected to it you can use the one button backup option on the sharespace to backup to that. However there is no way that I know of to connect another NAS to it and use this function to backup there.