By Kelsey twitter/ Last Updated May 18, 2022

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.

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Dropbox is not syncing all my files!

“I have always used Dropbox to sync my files, but I recently discovered that Dropbox is not syncing all my files. I try to quit Dropbox and reopen it to re-synced, but I still failed to sync all the files. Do you know what's going on? What should I do? Looking forward to your kindly reply!”

Dropbox is one of the most popular cloud storage services. It allows you to upload or sync files to the Dropbox cloud server, and then save your files safely in the cloud. You can access or share your files on the cloud at any time through different devices. If necessary, you can also download or sync them to the local.

To help users sync files between PC and cloud, it provides users with a desktop app. Generally, this Dropbox sync app works well on your computer, but sometimes, you may encounter some problems when you using this Dropbox app to sync your files. Dropbox not syncing all files is one of the common issues that many users may encounter.

Top 6 solutions to Dropbox not syncing all files issue

If you are facing this issue, don’t be panic and please read on carefully. There are some common solutions to the Dropbox not syncing issue, you can check them one by one to learn why is Dropbox not syncing all files and troubleshoot your problem.

Solution 1. Check the file name

Check the character length

As we all know, the limitation of Windows recognized character length is 260 characters (counting your Dropbox folder path in). Windows operating systems will not recognize files with filename exceed that limitation. So, you should check the filename of the target files. If they exceed the limitation, rename your target files and try to sync them again. It is worth mentioning that the name length limitation of Microsoft Excel files is 218 characters.

Check File Name

Check the invalid characters

Sometimes, your file name may contain some characters that can’t be recognized by the Windows operating systems, such as < > : “ | ? * . / \ and a space at the end of the name. Actually, these invalid characters in your filename will not be recognized and influence the normal running of your Dropbox. So, make sure there are no invalid characters in your file name.

Check File Characters

Solution 2. Check the File Size

If your file is too large, it will spend much more time to sync, and wait for a moment and check the sync status, if it is stuck syncing files, you could try to force Dropbox to sync. And then confirm if it's synced successfully.

✎Note: You should know the Dropbox file size limit is: is 50 GB; Dropbox desktop or mobile app is 2 TB.

Solution 3. Ensure no file is in use

If certain types of files are open or edit in certain applications like Microsoft Office (Word, PowerPoint, Excel, etc.), Dropbox will not sync them and display a "file in use" message. Because these applications will lock the files they are opening or editing to prevent conflicts caused by editing, moving or changing on other computers.

However, this operation will prevent Dropbox from accessing and synchronizing files. Therefore, if you find there are some files that not be synced, they may be opening or ending. If they are, you should save and close them so that Dropbox can sync them successfully.

Check File In Use

Solution 4. Disable Dropbox Selective Sync

To help users improve backup efficiency, Dropbox offers a feature called Selective Sync. The Dropbox Selective Sync feature only syncs certain files that you want sync to computer. So, you may find that Dropbox is not syncing all files or Dropbox app not showing all folders from cloud because you have enabled the Selective Sync. You can check if you have enabled this feature by going to advanced settings and resync the un-synced files by put the files you want to sync into the selective sync folder.

1. Open your Dropbox desktop app Preferences. Click the Sync tab.

Dropbox Preferences

2. Under Selective Sync, click Choose folders (Mac) or Selective Sync… (Windows).

Dropbox Selective Sync Option

3. Check the folders you'd like saved on your hard drive. Uncheck the folders you'd like removed. Click Update.

Dropbox Selective Sync

Solution 5. Reinstall Dropbox sync app

If your application version is too old or it has been used for a long time, the application itself may have some bugs or store too much caches. Therefore, you can try to uninstall the existing application and re-download the latest version of Dropbox app. In this way, if the files cannot be successfully synched due to a bug in the software itself, you can solve the problem easily by reinstalling Dropbox sync app.

1. Open the Control Panel from the Start Menu. Under the Programs section, select the Uninstall a program option.

Uninstall Program

2. Select Dropbox from the list of programs appearing in front of you, and click Uninstall.

Uninstall Dropbox

Solution 6. Ensure enough storage space

Actually, chances are that Dropbox can’t sync all the files to be synced just because there is no extra storage space. As we all know, the free account of Dropbox has 2 GB of cloud storage. Even if you have upgraded your account for more storage space, you may consume all the space you have purchased. So, you can go to check if you have enough storage space for all files.

1. Go to the Dropbox website and sign in to your Dropbox account.

Dropbox Sign Up Page

2. Click the icon with your name initials in the upper right corner. Choose Setting in the menu that appears.


3. Click the Plan tab and you can see your personal Dropbox space on this page.

Personal Dropbox Space

Bonus tip: backup your files with Dropbox free alternative

Although in most cases, the above methods can help you solve the Dropbox not syncing all the files issue efficiently, it is also possible that your Dropbox app still cannot back to normal after trying all the methods above.

In this case, you may need a free alternative to the Dropbox desktop app that can help you sync or backup files to Dropbox cloud server quickly and automatically. Or, you want to replace Dropbox with another cloud service with everything transferred in one click.

Luckily, there is a free cloud backup service called CBackup meets both the requirements above. No matter you need an alternative to the Dropbox desktop app or Dropbox cloud storage, CBackup can help you achieve that easily, because it supports PC cloud backup, cloud to cloud backup, and cloud to cloud sync.

1. Download CBackup and create a new CBackup account, and then sign in to CBackup desktop app.

Download CBackupWin 11/10/8.1/8/7/XP
Secure Download

2. Click My Storage on the left side, and click + Add Cloud button, then choose Dropbox and hit Add. Then follow the on-screen guide to allow CBackup to access your Dropbox files.

Select Dropbox

3. Select the Backup Tasks tab, and then press + New Task button to backup files to Dropbox.

Create Task

4. Specify the Task Name, and click Add Source button to choose folders you want to backup to Dropbox. Hit Add Destination button to choose Single CloudDropbox as the target location.

Select Destination Single Cloud

5. Press Start Backup button to backup files to Dropbox with CBackup.

Start Backup

✎Note: You can tap Settings at the bottom of the window before starting back up, tick Enable schedule backup option, specify the time you want to backup files to Dropbox, and click OK. Or enable Email Notification to get email about the backup result if you're not in front of the computer. Or include or exclude the file types with File Filter, save your time and speed up the backup.

Schedule Backup

In addition to PC cloud backup feature, you can backup Windows PC files to OneDrive, Dropbox, CBackup Cloud, even the combined cloud. If you meet the Dropbox is full problem, CBackup allows you to combine multiple cloud drive into one and backup file to it. Meanwhile, you could enjoy the cloud to cloud backup and cloud to cloud sync, which transfer files between clouds easily.


The top 6 solutions to Dropbox not syncing all files have been introduced. Actually, there is no guarantee that your problem will be solved successfully. If you don’t want to spend time on this problem, you can also replace Dropbox with CBackup.

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