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Drive and Photo Service:Sync backup (in invitational preview)

Last Updated:Feb 26, 2026

Use sync backup to synchronize folders between Cloud Drive for Enterprises (CDE) and local devices in real time. Choose bidirectional synchronization or one-way upload for collaboration, backup, and multi-device access, and maintain eventual consistency across devices.

Prerequisites

  1. Use the PC client to log on to CDE client version 1.4.0 or later. For the latest version, see Client download.

  2. Enable the history version feature.

  3. Provide the enterprise code and contact us to enable sync backup.

Enable sync backup

For first-time use, complete the on-screen installation steps to enable sync backup. 启用.pngimage

Choose a sync mode

Choose the sync mode based on your synchronization requirements before creating a task.

Mode

Recommended scenarios

Key behavior

Bidirectional synchronization

Collaboration and multi-device editing, where local and cloud data must stay consistent.

Changes on either side are synchronized to the other side.

One-way upload

Backup scenarios where local changes are synchronized to the cloud and cloud-side changes do not affect local files.

Local changes are uploaded. Cloud-side changes do not affect local files.

Set mode options in the task

Select bidirectional synchronization or one-way upload

In Synchronization type, select bidirectional synchronization or one-way upload for folders in team space, personal space, or received shares.

Then select the cloud folder that you want to synchronize.

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Advanced settings

Bidirectional synchronization

Keep local and cloud file data consistent. Changes on one side are synchronized to the other side.

One-way upload

  • Synchronize local folder changes to the cloud, except delete operations. Changes to cloud files do not affect local files.

  • The delete rule can be set in Advanced > Other Settings > Delete local files in one-way upload mode.

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Configure sync backup in the client

After sync backup is enabled, complete the following steps in the client to create and manage sync backup tasks.

Open sync backup

On the Synchronized Backup page, click Creating Synchronized Backups. image

Create a sync backup task

  • On the Creating Synchronized Backups page, complete the required fields Select local folder, Select cloud folder, and Synchronization type (default: bi-directional synchronization). image

  • On the Advanced page, configure sync filtering, sync throttling, local file deletion handling in one-way upload mode, and whether to enable automatic synchronization. image

Sync details

  • Sync details include Synchronized completion, Synchronizing, and Synchronization failed.image

  • Sort sync tasks by Cloud Name or Creation Time.

  • Filter sync tasks by synchronization status, type, and space. image

  • Manage sync tasks: pause, cancel, or configure synchronization, and view local or cloud synchronized files. image

Mode behavior reference

Use this section as a detailed reference after you choose a mode and create a task.

Bidirectional synchronization

In bidirectional synchronization mode, the local directory will be completely consistent with the cloud. File operations on one end will be reflected on the other end. There are differences when performing delete operations:

  • When a file is deleted locally, the corresponding file in the cloud will be moved to the recycle bin.

  • When a file is deleted in the cloud, the Windows system will move the local file to the recycle bin, while the Mac system will directly delete the file (currently does not support moving to the trash).

One-way upload

In one-way upload mode, the local directory will be backed up to the cloud. File operations in the cloud directory will not affect local files. This mode is mainly suitable for backup scenarios.

  • When different file operations are performed locally, the corresponding behavior in the cloud is as follows:

    File operation performed locally

    Cloud behavior

    Create a file

    Create a file

    Delete a file/move to recycle bin

    No operation by default

    (If the deletion configuration is enabled, the cloud file will be moved to the recycle bin)

    Move a file

    Move a file

    (Due to operating system limitations, moving A-->B/A may eventually result in creating A under B in the cloud, with the original A file remaining; the same applies to renaming files)

    Rename a file

    Rename a file

    Modify file content

    Create a new version

    Copy a file

    Create a new file

  • When different file operations are performed in the cloud, the corresponding behavior locally is as follows:

    File operation performed in the cloud

    Local behavior

    Create a file

    No operation

    Delete a file/move to recycle bin

    • If the file is uploaded locally: re-upload the original file to the cloud

    (To delete a file backed up locally in the cloud, you need to enable the delete switch first, delete the corresponding local file, and the cloud will automatically move the file to the recycle bin.)

    • If the file is not uploaded locally: no operation

    Move a file

    Rename a file

    Modify file content

    No operation

    (If the cloud modifies a file backed up locally, the file version successfully backed up locally will exist in the cloud file history version. However, due to the limitation of the number of history versions and the impact of automatic merge policies, the file version successfully backed up may be cleared. You need to set an appropriate version merge/cleanup policy based on specific usage scenarios or try not to edit files uploaded from local backups in the cloud.)

    Copy a file

    No operation

Permissions

Note

If you encounter issues during Authorization Management, refer to Permission Description.

Synchronizer permission

Users with the Synchronizer permission can perform bidirectional synchronization or one-way upload on folders in team space and received shares. image

Backer permission

Users with the Backer permission can perform one-way upload on folders in team space and received shares. image

No Synchronizer or Backer permission

Users without Backer or Synchronizer permissions can perform bidirectional synchronization or one-way upload only on folders in personal space and received transfers.

Usage notes

  1. Sync backup consumes storage space on both local devices and the cloud. Ensure that enough storage is available on both sides.

  2. To synchronize local files to the cloud in time, keep the client running in the background and maintain a stable network connection.

  3. After sync backup is enabled, if the sync backup entry does not appear in the user interface, log on again and check.

  4. This feature is a value-added service. It is free during public preview. If charges are introduced later, we will notify you in advance.

  5. During the creation of sync backup, if there are files or folders with the same name in the same path locally and in the cloud, the following automatic processing will occur:

    1. If files exist on both ends, the local file will be uploaded to the cloud as a new version, and the original cloud file will be saved in the history version.

    2. If one end is a file and the other end is a folder, one of them will be automatically renamed.

Limitations

Supported operating systems and versions

  • Windows 10 version 22H and above

  • Windows Server 2019 and above

  • macOS 12.0 and above

Linux and NAS are not supported

Supported file systems

  • Windows: NTFS, FAT32

  • Mac: APFS

Local directories not allowed to create sync backup

  • Directories within mounted disks.

  • Local sync directories created by other sync software.

  • Local directories that are link directories.

  • Ancestor or descendant directories of local directories have already created sync backup (sync directories are not allowed to nest).

  • System software folders, data folders, or other special paths, such as ProgramData and ProgramFiles(x86).

Number of sync directories

A single user on a single terminal is allowed to create up to 10 sync directories.

Number of sync files

A single terminal is allowed to sync up to 1 million files.

File path length

Windows does not support syncing files with a full path length exceeding 260 characters (system default limit).

FAQ

After deleting a file in the cloud, does the local keep popping up a delete prompt?

If you keep receiving delete confirmation prompts while deleting files, go to the Recycle Bin on your local system, open its Properties, and uncheck the option "Display delete confirmation dialog" to disable the prompt.

Sync status: Sync abnormal

If the sync status shows synchronization abnormal, troubleshoot the issue based on the prompt. If the issue persists, contact us.

Sync status: Sync completed, but files are missing after checking

If the sync status shows Synchronized completion, but you find that files are inconsistent or not synchronized in time, provide the corresponding ID, file name, local file path, and contact us for troubleshooting.

Red exclamation mark appears in sync status?

If a red exclamation mark appears next to the sync status, some files failed to synchronize. Select the sync directory, click Sync Details, and troubleshoot based on the failure prompt. If the issue persists, contact us.

Sync disk cannot start normally?

If you receive the error "Windows cannot find the file 'bin/syncapp.exe'" when launching the program, please check your antivirus software (such as 360) for any interception records similar to “A trojan attempted to attack your computer. 360 successfully blocked it.” If found, manually add the file path to the whitelist. If the issue is still not resolved, please contact us.