RealTimeSync Mirror only not 2-way

Get help for specific problems
Posts: 3
Joined: 1 Sep 2025

mav

Hi there,

Just wondering if RealTimeSync can work with mirror-only and not 2-way sync.

Trying to backup music and I want one directory to be the authoritative source.

Thanks 🙂
User avatar
Posts: 2978
Joined: 22 Aug 2012

Plerry

RealTimeSync (RTS) only monitors folders for changes, and upon detecting a change in any of the monitored folders (or their subfolders) will launch the specified Command Line, commonly launching FreeFileSync (FFS) to rum a sync.
In the FFS sync configuration you determine the sync variant (Two-way, Mirror, Update, Custom), not in RTS.

If you want RTS to launch FFS to run a Mirror sync, you only need to have RTS monitor the source folder (left location in your FFS sync), and in the RTS GUI can remove the destination folder from the list of monitored folders. You can remove the destination folder in the RTS GUI by clicking the red minus-icon in front of the destination folder.
Posts: 3
Joined: 1 Sep 2025

mav

RealTimeSync (RTS) only monitors folders for changes, and upon detecting a change in any of the monitored folders (or their subfolders) will launch the specified Command Line, commonly launching FreeFileSync (FFS) to rum a sync.
In the FFS sync configuration you determine the sync variant (Two-way, Mirror, Update, Custom), not in RTS.

If you want RTS to launch FFS to run a Mirror sync, you only need to have RTS monitor the source folder (left location in your FFS sync), and in the RTS GUI can remove the destination folder from the list of monitored folders. You can remove the destination folder in the RTS GUI by clicking the red minus-icon in front of the destination folder. Plerry, 01 Sep 2025, 12:52
Hi Plerry :)

I believe I might've been over-complicating my use-case. I only really need it to run daily, not instantly on changes (but your information is super useful for other cases!!). Excited about the option you provided in the last paragraph. :):)

So if I save the mirror batch job in FFS, and run it as a task scheduler task, that is enough to run a mirror only job - right?
User avatar
Posts: 2978
Joined: 22 Aug 2012

Plerry

> ... that is enough to run a mirror only job - right?
Correct for an e.g. daily sync, non-(semi)instantaneous sync.
Posts: 3
Joined: 1 Sep 2025

mav

> ... that is enough to run a mirror only job - right?
Correct for an e.g. daily sync, non-(semi)instantaneous sync. Plerry, 01 Sep 2025, 15:26
🙏 Thank you so much for your fast replies today. Heck yes!