Can't get Time Machine to work with Nighthawk

First I will comment that I am aware of your instruction to use Terminal to set the destination. However, since I already have one Time Machine backup running I was concerned that running the referenced Terminal command might muck up my current TM backup. Perhaps my cirumstance and request is too obscure for the purposes you have generously provided but I was hoping to learn one way or the other if I could make this work.

With respect to your questions to clarify what I was trying to describe I did intend to attach these pics the first time around:

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antinode wrote:
in reply to this comment of mine:

> [...] once the sparse image is mounted it winds up in Time Machine's
> privacy exclusion list [...]

 

>>   What, exactly, does "privacy exclusion list" mean to you?  Do you
>>mean the Options... > "Exclude these items from backups:" list, or
>>something which actually mentions "privacy" somewhere else, or what?

 

>>   As usual, showing actual actions (commands) with their actual results
>>(error messages, LED indicators, ...) can be more helpful than vague
>>descriptions or interpretations.

 

Early on with Time Machine after it was introduced, (perhaps with Snow Leopard?)  I learned that Time Machine's "exclusion list" or "privacy list" or even what I used "privacy exclusion list" referred to:

 

System Preferences -> Time Machine -> Options -> Exclude these items from backup

 

Even the tmutil man page refers to "exclusion" so that word and those phrases have just stuck in my head. Writing all of this out makes me appreciate your comment more that I should have used different language for the purposes here. I will take more care if I should post again.

 

>>   If your backup destination is visible as part of your local file
>>system, then Time Machine _should_ exclude it from its backup to-do
>>list.  Including the backup destination itself in the list of items to
>>back up would be circular.

 

Yes, I was slow catching up to that and that information was just stuck in my brain. It makes complete sense and I do understand your comment here.

 

> Does anyone have an idea how I can keep it out of Time Machine's
> privacy section?

 

>   Where, exactly, did you find this "privacy section"?  About what,
> exactly, are you talking?

 

As I mentioned at the start, I learned early on the ways I used to describe certain Time Machine Options , especially the use of words/phrases such as "exclusion list" as well as "privacy pane" in Time Machine's Options preferences. I belong to a few Mac Lists that all use, and accept, that type of terminology. Obviously this forum is different and I failed to consider that when I used the terms I did. 

 

If you are interested, here is one site I was reading for reference while I was trying to sort this out:

 

advanced-time-machine-backups-multiple-sources-multiple-destinations/ 

 

where part of their descriptions say this:

 

"You should see the external drive listed in your exclusions. You can then select it and click on the – button below. You remove it from the exclusions in order to add it to the list to back up."

 

When posting to this forum I will definitely think differently about the terms I use. It is now easy to see how the way I intended to describe things did not come across in the manner I had hoped.

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