Hey there, @provlima!
You can also use Windows' built-in Backup & Restore utility. It basically works like this and even reminds you when you need to plug the portable HDD to perform a backup again. You should be able to find this feature in Control Panel > System and Maintenance > Backup and Restore
. I'd also recommend checking this MS article for more details
Using third-party utilities is also a good backup option, however, make sure that they do both a system & file backup, if that's what you are looking for. There are tools that do one or the other as well.
Keep us posted if you have more questions!