Backup Software Windows 10

I would suggest to use Veeam Agent for Windows v2. It allows you to configure backup of whole computer, selected volumes or folders. It has a free and paid version (includes support). You can check for more info here:
https://www.veeam.com/windows-cloud-server-backup-agent.html
Alternatively you can configure robocopy job and execute it via scheduled tasks to copy selected folders to backup drive.

SyncToy looks simple.  Is there documentation for the .bat file anywhere?

Sync Back Pro is also simple and has built in profiles and a Scheduler.

Taking a look at all suggestions

If you're looking into SyncToy the backup batch file is pretty simple:

"C:\Program Files\SyncToy 2.1\SyncToyCMD.exe" -r

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Obviously you would modify this for wherever you have chosen to install SyncToy. Save this code to a batch file and then you can task schedule to run the batch file whenever you want it to run. That should run all scheduled tasks in SyncToy. It will run this from the SyncToy CMD but you can set up the folder pairs in the GUI.

Remember that Microsoft builds it sync software so that one file is the owner and the other file is owned by the owner. Other non-Microsoft sync software has real physical files on both ends. I like that.

Ultimately, you've been given quite a few pretty good options to choose from so far. As John stated, Microsoft-based sync tools do have their pitfalls, but I can tell you that on a smaller scale I've not had issues with customers from SyncToy. If you're looking to scale this into a large operation, I wouldn't advice my option.

if you just need to sync a few folders from source to destination I would just use Robocopy it is included with windows and would not cost anything to use.
Just use the mir option and let it sync the folders via a scheduled task.

create a batch file i.e.

robocopy.exe "C:\Folder" "E:\Folder\" /B /MIR /w:1 /r:1 /COPYALL

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Then go into task scheduler and create a scheduled task to run it once a day.

Thanks guys

You are very welcome and I was a happy to help.

No problem at all. Feel free to ask for help anytime.