Change Existing B2D Path

Testing BE 2014 on 2008R2. Our existing NAS is almost out of space and we now have a new NAS just for B2D. So what i was thinking i could do is edit the existing jobs to reflect the new path. Now we have something like: \\nas\Backup\<title>\servername

I thought i could edit the existing path to this: \\nas1\Backup\<title>\servername but it does not look like this is possible. Can someone tell me if this is possible and if so, how?