MacBook – Changing from HDD to SSD with the Airport Time Capsule

I used Apple's Express Lane tech support. (Being as this was a brand new TimeCapsule, there was no fee.)

The tech told me that TC no longer supports backup to an external drive as of the 2nd Gen TC. He would not speculate as to why.

I can speculate that perhaps Apple wanted you to buy a bigger TC instead? Or perhaps (as was my experience) backing up to an external drive seemed to cause the TC to shut down (maybe overheated).

However, I can and did hook the drive directly to my USB port and I can back up that computer to it using Time Machine software (which is what I wanted to do anyway.)

Odd to answer my own question but this thread may provide an answer to the next guy.

Time Machine's thinking is backup everything except what you tell it not to and the time machine hard drive itself. It should not matter how many drives you have connected, they should all be backed up to the time capsule just fine. In other words, you can backup multiple sources but only on one destination, as long as this destination shows up as a single logical drive in the Finder.

Just check in Sys Prefs > Time Machine > Options if the other HD isn't just simply added to the list of exceptions, don't see how it would end up there by itself, but just in case.

And I don't think you can keep working with the same backup, since you divided the data in to 2 separate logical drives. Time Machine just does not think like that. Better start from scratch, perhaps backing up the current backup set to another drive if you need to preserve all the previous backups... Some people need to be able to go back in time to a specific point. I care only to have one up-to-date copy, don't care much about having 30 different ones.