Partial removing of backup folders in NORTON 360

I have 3 subfolders under N360_BACKUP. The first is over 3 months old, and I can take the risk of removing it. to free some space for new backups.

My question is: If I delete that subfolder and its contents, will the Software be smart enough to keep recognizing the other two and of course allow eventual  "Restores" should the need arise? In the past I used Norton Ghost and that was powerful software.

My opinion is that Norton360 backup is weak. I would like to be wrong is this particular point.