With Dr.Fone for Android, you can easily back up everything on Samsung Galaxy Note 7 such as contacts, messages, apps(app data), calendar, photos, music, videos, etc. Once you lose them by accident, you can restore all backup files stored on computer to your Samsung Galaxy Note 7.
Also works with other Samsung mobiles:
Samsung Galaxy Note 3, Note 4, Note Edge, Note5;
Samsung Galaxy S4, S5, S6, S6 Edge+, S7, S7 Edge;
Samsung Galaxy A3, A5, A7, J1, J3, J5, J7, etc