What is Two-Way Sync?

Before understanding two-way synchronization, it’s necessary to know the one-way synchronization.

One-way sync is a sync mode that sync items you specified from the source directory to the destination directory, any changes in your source location, like creation, deletion, modification, will be synced to the destination.

Two-way sync (also called bidirectional sync), is another sync mode that sync items between the source and the destination location. Any changes in the source path will be synced to the destination; any changes in the destination path will be synced the the source as well. Two-way sync mode keeps the two folders exactly the same.

Best Two Way Sync Software

To perform two way sync between your two folders, the professional two-way sync software is required.

AOMEI Backupper Professional is such a file synchronization software, which provides multiple sync features, like Basic Sync (one-way sync), Real-Time Sync, Mirror Sync, and the Two-Way Sync to fulfill your different demands on different environments.

It’s highly recommended by millions of users due to the powerful features and reliable performance. Please download the AOMEI Backupper Professional 30 day free trial to have a shot.

Two-Way Data Synchronization Best Practices

Here we are going to show you how to perform two-way file sync.

1. Please download AOMEI Backupper Professional, install and launch this file sync software, choose Sync tab, and then choose Two-Way Sync.

Two Way Sync

2. Click + Add Folder push button to choose the source folder you would like to sync. Change the Task Name to differ from others if need be.

Add Folder

3. Select a destination folder.

Choose Destination

4. Press Start Sync >> to perform two way synchronization to sync two folders.

Start Two Way Sync

There are some optional settings you could set up before syncing:

1. Sync Settings: Click the Options to open Sync Settings window.

In General tab, you could write a comment on the sync task, enable email notification to get email or SMS alert after syncing once you set up.

Sync Settings

In Command tab, you could enable pre-command or post-command to run specified program or script before or after the synchronization, etc.

Pre Command Post Command

At the Advanced, you could tick the Automatically create a folder with the same name as the task in the target location.

2. Schedule Settings

Schedule settings allows you sync the data via 5 modes: Daily, Weekly, Monthly, Event triggers, USB plug in.

1). Daily has three options you can make:

  • Run once only at D/M/YYYY, HH:MM, the time you specified.

  • Run once every day at HH:MM.

  • Intervals: every 1 hour, 2 hours, 3 hours, 4 hours, 6 hours.

Schedule Daily

2). Weekly

Schedule Weekly

3). Monthly

Schedule Monthly

4). Event Triggers: 4 events included to trigger the sync task, User logon, User logoff, System startup, System shutdown.

Event Triggers

5). USB plug in: If you perform two-way sync between USB drive and the computer, you could use this option to automatically sync changes to the other side once the USB drive related to the two-way sync is detected.

Usb Plug in

During the two-way sync process

During syncing, there are something you could do to automatic the process:

1. You could set up the awaiting execution event to the computer: click the setting icon at the bottom left corner, tick On completion, and choose one of the four events: Shut down PC, Restart PC, Hibernate, Sleep, and press OK.

Awaiting Events

Once the two-way data sync finished, the computer will do the event what you set it up.

2. Cancel the two-way synchronization process. If you found you set it wrong, and want to cancel it, just do it.

3. View the sync details by clicking the underlined text, like sync files, numbers, sync speed, remaining time, etc.

Two Way Sync Details

After the two-way sync is reaching 100%, please hit Finish. Until now, the two-way data synchronization has been finished successfully.

Two-way Sync on Home Tab

After you set up a two-way sync task, you could go Home tab, find the two-way sync task, click three bar icon, choose the option you would like to operate:

Schedule: If you haven created a schedule two-way sync, you could click it to schedule it.

Edit Sync: you could change the source folder and the destination folder, and other settings related to the two-way sync task.

Locate Sync: Choose this option will help you to open the two-way sync destination folder.

Shortcuts: This function helps you create a shortcut on the desktop for you to run this sync task by doubling click the shortcut.

Two Way Sync Shortcut

Some Tips for Two-Way Sync

1. Please don't change the source folder name once the two-way sync task has been set up, or the 2 way sync will be failed due to the source sync path does no exist, information Code: 4199.

2. The maximum file path of Two-Way Sync is restricted to 256 characters.

3. The source folder and the target folder cannot have a containment relationship.

4. CD files not supported in two-way sync and other sync features.

5. You cannot sync system folders and files with two-way sync features, because the system folders and files cannot be overwritten due to the security.