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Box Sync 4.0: Release Notes


What Is Box Sync?

Box Sync is a productivity tool that allows you to mirror data stored on Box to your desktop. You can then navigate and modify content stored on the Box website through your computer’s native file browsing interface, without using a web browser. Content that syncs down to your computer are available for offline access. If you make changes to the synced files locally, these changes automatically sync back up to your Box account.


System Requirements

Box Sync 4.0 currently requires the following:

  • Mac:
    • OS X 10.7, 10.8, and 10.9
    • HFS or HFS+ formatted hard drive
  • Windows:
    • XP, 7, 8, and 8.1
    • NTFS formatted hard drive
    • One of the following combinations of Microsoft .NET Frameworks: 


Upgrading from Earlier Versions

See How do I upgrade from Sync 3.x to Sync 4.0 for detailed instructions to upgrade your version of Box Sync.


Proxy Support

See What Is the Proxy Support for Box Sync?


What’s New in Box Sync 4.0?

Details of the key features released in this version of Box Sync 4.0 are listed in this section.


Syncing 100,000 Files

Box Sync 4.0 does not limit the number of files and folders that can be synced at any given time. Box has successfully tested and synced 100,000 files in various scenarios.


Improved Overall Performance

Box Sync 4.0 uses an “always watching” strategy to report any changes that occurred in Box or on your computer. This strategy now allows Box Sync to receive notifications on each file that changed in either system, thus providing quicker and accurate reports. This change allows Box Sync 4.0 to deliver better performance, particularly when syncing a large number of files.

In comparison, Box Sync 3.x scanned each system first and then repeated the process even if only one file was changed in either system thus making it a time-consuming process.


Improved CPU Usage

Box Sync 4.0 consumes 25% less CPU than our earlier versions. While this improvement is significant, we anticipate improving it even further with each release.


Root-Level File Syncing

Box Sync 4.0 allows you to directly sync files in the Box Sync folder.

In Sync 3.x, this action creates a separate "Default Sync Folder" and the synced file is moved to that folder.

In Sync 4.0, the file is synced in the Box Sync folder itself. When you sync a file that resides in a nested folder, you also see the file being synced in each parent folder connected to this file.

In Sync 3.x, this kind of syncing is not possible.


Unsync on Delete

You can delete an unwanted folder from your local system. Deleting a folder in your local system does not delete the same folder on Box; it will merely unsync the folder, remove it from your local system, and keep it saved on Box. If your intention is to delete this folder in both locations, you need to explicitly delete the required folder on Box. This behavior protects content from unintentional and accidental deletions.

This behavior only applies to folders. If you delete a file in your local system, you will automatically be deleting it from Box as well.


Right-Click Menus

In both Windows Sync and Mac Sync, you can right-click any file or folder to share a file or view it on Box.

  • If you Share a file, the corresponding link for that file is copied to your clipboard. You can paste this link into any other application.
  • If you select View on Box, the file is opened in your default browser. You can then comment, assign tasks, view the version history, or lock/unlock the file.


Subfolder Syncing

See How do I Sync Subfolders? for more information.

Notifications when Files Cannot Sync

If an item cannot be synced, Box Sync 4.0 immediately displays a notification on your local system along with the name of the problem item.

Click the Box Sync desktop icon (the b icon) to obtain additional details on the problem item.

See What Do Problem File Notifications in Sync 4.0 Mean? for solutions or workarounds to fix a problem. Once you fix the problem, the item will be synced automatically.


Additional Resources

The following resources are available for the Box Sync 4.0:


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