tell me - hoe often does xara do a back up ? you can set your interval I know

I set my acronis intervals too - but it monitors the system all the time, and yes that has a performance overhead and is one of the reasons I have a high spec desktop

the whole system is then backed up in one place [and then backed out on the network]

to use xara back up would be a duplication of effort and a duplication of file instances, which i do not want

as acronis works in the background no program gets interupted, not even for 5 secs