Greetings,
A frequent back-up is also recommended. You can paste a profilefile in any dropbox, for example Google Drive or Dropbox. As long as you dont forget your logindata, its safe.
I would recommend doing this once a week. This because if something goes wrong, or you get a new PC and forget about it, you lose it again. Not sure when you can actually really really be in need of it, but when you do you have it and know where to find it. Also, what my fellow members said above is not bad either, I would use it for future use.