So i was told Time machine was a great tool for backups and or live ones. But this was only available for mac, so i had to look around.
After a lot of that, i found this. https://www.microsoft.com/en-us/download/details.aspx?id=15155
It's from MS so it's no bullshit at least.
It looks very simple, but direct and effective.
The things you want backed up are on the left. You can make more than one folder group.
The folder on the right is your external hdd for example.
First select a group or all of them. Run it, and it will compare the folder and depending on your options it will sync them.
Finally no more copying files one by one, doing everything very manually. This came out very handy since i have a lot of music and other media. So I can just hook up the ext. hdd press Run, and after a while it's all done.
I know this probably not the best of the best, but it's small and a very logical and easy way to sync things quick.