By Kelsey twitter/ Last Updated November 25, 2021

Why Do You Need Cloud Backup?

  • Are you afraid of accidentally losing the data stored on your hard drive?
  • Are you anxious that there is not enough space locally for backup?
  • Are you panicked that you have lost all local backups due to local accidents?
  • Backup all your data to the cloud offsite, never lose data and recover them from any PC.

Eliminate all your concerns with the Best Cloud Backup service - CBackup

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User case: Backup and Sync - cant connect error

“I upload PDF files to my Google Drive folder. Now I’m trying to upload them to cloud. I get “Can’t Connect” error. cFosSpeed shows PC uploads something but the same files were not completed (or any other files). How to fix this?”

Cant Connect

Backup and Sync could be understood as a desktop client of Google Drive. This tool is designed to help users backup and access Google files and photos from their computers. Recently, many users have discovered that Google Backup and Sync “can’t connect” error prevents them from using this program normally. Don't worry too much, this article will solve this problem for you.

One thing is that, from October 1st, 2021, users of Backup and Sync have to move to Google Drive for desktop, the new client program of Google Drive. And users will not be allowed to log in to Backup and Sync any more.

Google Backup and Sync

Why Backup and Sync cannot connect on Mac or PC?

Before we introduce the "solutions", let me remind you why Google Backup and Sync is unable to connect on Mac or PC.

Google Backup and Sync (now it is Google Drive for desktop), like all applications and software, will occasionally have errors and problems. Google Backup and Sync can't connect is one of these common problems. Why Backup and Sync does not work? The reason may be a network problem, the program is blacklisted by anti-virus software, the user account lacks admin rights, and the account is connected with the agent, etc.

How to fix Google Backup and Sync cant connect?

If the program that the user is using suddenly fails, this will cause great inconvenience. This page will provide some effective solutions and simple steps to repair Google Backup and Sync can't connect on Mac or PC.

Method 1. Reinstall the latest version of the program

Maybe the version of the program you installed is relatively old or damaged, try to download the latest Backup and Sync to solve the problem.

Step 1. Follow the normal steps to uninstall Google Backup and Sync on your computer.

Mac: Open the Finder, click Applications, drag "Backup and Sync" to the Trash at the bottom, navigate to the “Go” menu, select "Library", and delete the "Application Support / Google / Drive" folder.

Windows: Press Windows + I, then click Apps, select "Apps & features" on the left, enter "Backup and Sync" in the search box, find the program, and click Uninstall.

Uninstall Windows

Step 2. Navigate to, download, and install the latest version of Backup and Sync.

Step 3. Open the latest version of the program, log in to your account, and check whether it can be used normally.

Method 2. Check Firewall/ Antivirus Programs

Google Backup and Sync (Google Drive for desktop) unable to connect is sometimes caused by excessive protection by firewalls or antivirus programs.

Step 1. On the computer's Control Panel, click System and Security, then select Windows Firewall, then click Allow an app through Windows Firewall.

Step 2. Then you can see the list of all services allowed/prohibited by the Windows firewall.

Step 3. Search for “Backup and Sync”, and enable it under both the Private and Public columns.

Enable Backup And Sync On Firewall

If you are using antivirus software, please check its settings to ensure that Backup and Sync is allowed, or you can delete the anti-virus software. Then check if you can log in to the Google backup application and use it normally.

Method 3. Run Backup and Sync as Administrator

The lack of user account admin rights may also lead to failure to connect on Google Backup and Sync (Drive for desktop).

Step 1. Right-click the desktop shortcut of Google Backup and Sync and click Properties.

Step 2. In the pop-up window, go to the Compatibility tab.

Step 3. Then click the option Run as administrator.

Run As Administrator

Try to re-enter the Google client application, and confirm whether the program can be used normally.

Method 4. Change proxy settings

If you set up a proxy to connect to the Google account, you may not be able to connect the program.

Step 1. Click the desktop shortcut of Backup and Sync and select "Preferences".

Step 2. Click Settings on the left, and then click NETWORK SETTINGS below.

Preferences Settings Network Settings

Step 3. Turn off Auto-detect proxy settings option and enable the Direct connection option.

Enable The Direct Connection Option

Bonus Tip: Turn on Backup and Sync in the correct way

Make sure that the backup steps you perform with Backup and Sync are correct to avoid unnecessary problems.

  • On your computer, download and install Backup and Sync.

  • Sign in to the Google Account that you use for Google Drive.

  • Select the file you want to back up.

  • Under 'Photo and video upload size', select the upload size.

  • Click Start.

An Advanced Alternative to Google Backup and Sync

As a desktop application, Google Backup and Sync (or called Drive for desktop now) is prone to problems due to computing systems and some network conditions. It is a waste of time to repair from time to time, especially when you are in urgent need of use, the cumbersome repair may make you very troubled.

You can use the third-party cloud service - CBackup to back up Google Drive files if you are tired of handling various issues when using Backup and Sync. CBackup is an advanced and professional online cloud service, which supports directly backing up files on your computer to Google Drive. If there is a problem with your Backup & Sync, you can switch to CBackup to store your data to the cloud.

CBackup Main Page

1. Install CBackup desktop app, sign up an account on CBackup to sign in.

Sign In

2. Go to My Storage > Add Cloud > select Google Drive > Add. Then follow the steps to sign in to your Google Drive account, and allow CBackup to accsee your Google Drive files.

Add Google Drive

Select Google Drive

3. Then go to Backup Tasks > New Task.

Create Task

4. Press the Add Source button to select files from PC to backup, and click Add Destination > Single Cloud > Next > Google Drive > OK.

Add Source

Select Destination Single Cloud

5. Hit the Start Backup button to backup PC to Google Drive and you could avoid Google Backup and Sync can't connect issue forever.

Start Backup Files to Google Drive

CBackup also supports cloud to cloud backup. You can use CBackup to backup Google Drive files to other cloud drives to avoid Backup and Sync failure. you can also manage multiple cloud storage accounts to combine small storage space into a larger backup space.

Shown below are the steps to back up Google Drive files via CBackup.

Step 1. If you already have an account, you can sign in directly.

Sign Up

Step 2. Click My Storage > Add Cloud to authorize Google Drive account. Then click Add to add it. You can also add other cloud storage accounts. And all the accounts you added will be listed under My Storage.

Add Google Drive

CBackup can also help you back up files on Google Drive to other cloud drives (such as Dropbox, OneDrive, etc.). Follow the steps below to continue.

Step 3. Click New Task under the Backup Tasks tab.

Create Task

Step 4. Click Add Source to add Google Drive as a transfer source, and click Add Destination to add another cloud drive as a backup destination.

Add Source And Destination

Step 5. Finally, click Start Backup to execute the backup task.

Start Backup


This is all about the causes and solutions of Google Backup and Sync can't connect on Mac or PC. These detailed steps will help you solve this problem. However, Google Backup and Sync may also crash due to other problems, which is troublesome and time-consuming to repair. Don't forget to use the professional CBackup to backup and manage your cloud drives.

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