Hi there @karentiamson21!
Glad I could help.
Just to clarify a few things, there is no way to exclude a segment within a segment. While it's not possible to use that type of condition you can easily ensure that a profile meets the criteria of a separate segment by doing the following. Clone the original segment by clicking Manage Segment > Clone Segment. You can then add the additional conditions that you want. Profiles will have to be included in the original segment (becuase they meet all the original conditions) and they will also meet the new conditions that you add.
In the example I gave the “trial kit” is a custom product used to demonstrate a possible way to distinguish between paid and free subscribers. That way, you could say “oh for every free user who selected the trial kit/free plan, I can segment off those who have ‘purchased’ this plan. In your own store definition, this could just be a workaround depending on how you have the paid vs free subscription products defined and how the interact with your data.
Looking forward to your update!
Alex