Crash[plan and multiple NASes. Best strategy?

Hey, Stephen, thanks for your comments.  You've made me think my Plan B choice is at least the place to start, as I suspected.  I've got a lot of data, so I suspect I'll have similar issues with de-duping and such, which certainly makes using the Ultra4Plus as the "server" a bad idea,.  If I need to, I can upgrade my PC "server" -- it will accept a Quad processor and more memory a lot easier than the NASes.

I've seen some issues posted when Crashplan updates their software on the NAS and really wanted to avoid all that -- especially on multiple NASes.  I could write a batch file for moving between NASes and local control with the Windows front end, but that's just for routine swapping.  Changes due to updates would be manual.  And if the updates are automatic, unlike what I thought, then I can't even choose when to do it.  I can do without all that.

I didn't plan to mount any PC drives on the NAS in Plan C, anyway, but that doesn't change things.  I don't expect to do away with my existing PC image backup plan, either, but would now have them doubly backed up -- the NAS and Crashplan cloud.  My current overall backup plan is multiple NASes in the same location.  The files on the primary NASes and the PC images are backed up to other NASes, which does not protect me from theft, fire, hurricane, etc.  This would do that, plus free up some NAS space by eliminating some local backups while adding some additional redundancy (cloud backup of PC images).  And with space freed, it makes my migration to OS6.x on all of them easier.

I have some family members who backup remotel;y to my NASes, too.  That was why I asked about backing up others' backups -- I could shift them from ReadyNAS remote/ReadtCloud to Crashplan free.  But I'm not surprised that it's disabled -- it would make my kind of plan a way around the fees if you don't mind there being a middleman.