How can I have 2 iPhones in 1 account without conflicting their back ups?
I have an iPhone 5s and just bought an iPhone 7. I restored the contents of my iPhone 5s to my iPhone 7 and everything is like a continue where you left off. I am happily using my 7 now and was thinking of doing a back up but have not. I am unsure what will happen, later on, if I plug my iPhone 5s back into my iTunes and decide to do a back up. I am guessing whichever I back up will replace the previous back up and I suspect my iTunes think both are one and the same account.
So here is my problem. I have intentions to still use my 5s for travels but I do not want my back up of this to replace the 7. I would like to tell iTunes I have 2 iPhones and I need separate back ups of each. I hope not to create a new account as I am planning to upgrade my iCloud and store both back ups into 1 iCloud account (since the upgrade gives me 200G of space).
Should I have created a new phone profile when I began using it? But how will I then import all the contents from my previous 5s to the new 7 if I choose a new phone profile. I have since renamed my 7 on my iTunes but I am unsure how it will help when I plug in my 5s to the mac. I am hesitant and a bit fearful. At this stage, I can still afford a do-over if it helps create 2 separate back ups for me. btw I assume my question on back up relates to sync as well. I will also need to extract photos of each phone and keep them separate (not replacing one or the other in the phone after I sync) but I suspect the photos are no big issue.
Also another question, I understand back ups and replaced when a new back up is done. So I can no longer have the old back ups. If I also back up on my Mac, is this the same situation as well?
iPhone 7, iOS 10.2