Any free backup software that can sync in real time?

What I'd like to do is configure it to monitor one folder and automatically update another folder to reflect the state of the first one. For example, if save a file in folder A it'll save the same file in folder B. Or if I change a file in folder A and re-save it, it'll automatically re-save the new version to folder B.

 

SyncToy oldie but goodie from Microsoft

 

Thanks newbino. I tried SyncToy but it requires .NET Framework so that's a no-go, for me at least. I found a couple of others and tried 'em (FreeFileSync and Allway Sync). So far I'm pretty impressed with Allway. Supposedly it's got a 40,000 files per month limit for the free version but I don't foresee ever reaching that limit. Actually, I don't think I'm even gonna need auto sync. Allway's so fast I can just sync manually when I'm done working.

 

Not quite real time, but a robocopy batch file would work. It's free and fast.

https://www.wilderssecurity.com/showthread.php?t=351249&highlight=robocopy

 

SyncBack is amazing
there is a free and portable version too
lot's of option ,and customization , i guess it's the best

 

My preference is SyncFolders (free) for scheduled, and Syncback SE (not free) for real-time. Both have versioning.

 

Checkout Comodo Backup Free.

 

I use FBackup, runs great

 

Comodo is great. Never had a problem.