Personal preference I dare say would be the answer for the most part, belt and braces would be both, or stick with what you know works is the alternate option, sorry there is no clear answer from me, but due to the variables I mentioned as reasons, there is probably no single answer better than another in this instance.
So lets try and expand on the reasoning behind my response:-
Personal preference; simply put everyone has their favourite ways to do things, simple as that really.
Stick with what you know; as above really, but increased possibly with the knowledge that it is tried and tested, and you know it works, and are comfortable in doing it this way.
Belt and Braces; do both, should one method fail to work, the other one may\should work, add to that you should never rely on a single backup, if that backup becomes corrupted then you have nothing.
Obviously these are very simplified responses, and there is a much deeper meaning and reasoning that goes into this if you want to get really involved, but I leave that to others who know more than I do, but there are other factors to take into account as well, not only should you not rely on a single backup, you should also store backups in more than 1 place, eg a single hard drive, if that drive dies, then everything is gone.
Luckily storage media is much more affordable these days, so using a hard drive within the system to save to is fine, but it would be wise to also save to an external drive as well, this way if the system takes a hit, you have the external backup to fall back on if the worst happened, but remember the backup is only up to the date it was made, so everything since the last backup is not protected, so if you are always updating\increasing your data that needs backing up, you should get in the habit of weekly or monthly (depending on need\importance) either create a new backup, or use incremental backups to save time, but you probably know already know all this if you're used to doing it, but hopefully this gives you some idea what is best for you.