apps/ringtones in iTunes 12.7
hi, I download all my apps, app updates, ringtones iBooks etc on my iMac then sync to my iPhone/iPad, what am I to do now? I've read all the supporting documents etc. what happens when its comes to backup and restore to a new iPhone etc is all the apps etc going to be there? do I delete the Tones and Mobile Applications folders from finder in iTunes Media folder as iTunes can't see them now?
thanks in advance
iMac (Retina 5K, 27-inch, Late 2014), macOS Sierra (10.12.6)