Are you getting Dropbox 400 error message? Try these solutions

Are you getting Dropbox 400 error message? Try these solutions 1

  • Dropbox is an online service that provides cloud storage for millions of customers worldwide.
  • However, this service has its own share of problems, and that's what we'll cover in the next article.
  • You can find more guides like this in our dedicated Dropbox bug fix center, so be sure to check that out too.
  • For more information, see also our web application solutions page.

Most of the error messages provide some clues as to the cause of the problem, but not the Dropbox error 400. This is a fairly generic error code that appears when you log in, export a file, or sync Dropbox with another service.


How do I fix Dropbox error 400?

1. Rename the file to fix Dropbox error 400 on uploads

Another variation of the error is displayed when you try to upload files to Dropbox.

Loading failed: operation could not be completed. ( error 400)

If you get this 400 Dropbox error message, just rename the file you want to upload. Renaming the file to a shorter name fixes the problem.

2. Reinstall Dropbox

If you get Dropbox error 400 in desktop Dropbox app, please use this solution.

  1. press the Windows key and R to open the to run accessory.
    • From the dialog box, enter appwiz.cpl and click OK.
  2. From the list of applications, find and right-click Dropbox.
    • Then hit Uninstall.
  3. Follow the uninstall wizard and restart your PC when finished.
  4. When the system turns on again, press the Windows key and me to open File Explorer.
  5. Then go to the folder path bar, enter % LOCALAPPDATA% and press Enter.
  6. Locate the Dropbox folder and delete it.
    <img class = "aligncenter wp-image-472252″ alt=”dropbox-error-400-delete-dropbox-folder” width=”481″ height=”500″ srcset=”┬┐Recibe-el-mensaje-de-error-400-de-Dropbox-Prueba-estas.png 791w,×300.png 288w,×799.png 768w,×210.png 202w,×120.png 115w,×140.png 135w,×64.png 62w” data-lazy-sizes=”(max-width: 481px) 100vw, 481px” src=”┬┐Recibe-el-mensaje-de-error-400-de-Dropbox-Prueba-estas.png”/>
  7. Now, just like you did in step 5, navigate to % APPDATA%,% PROGRAMFILES (x86)%, and %PROGRAM FILES%.
  8. Delete the Dropbox folders in each of the above locations.
  9. Finally, download the Dropbox app from and install it.

3. Unlink Dropbox

  1. Visit and log in to your account.
  2. Then click on your image in the upper right corner of the page and select Configurations from the resulting dropdown menu.
  3. On the Dropbox settings page, switch to Security tongue.
  4. Here, you will find the web browsers and devices linked to your Dropbox account.
  5. Click on the X next to the web browser or device that returns the Dropbox error 400 to unlink it.
  6. Go back to the client where you received the error (the one you unlinked) and log in to your Dropbox account to link back.

4. Update your drivers

  1. Right click on the Start button and select Device administrator.
  2. Here is a list of devices currently installed on your computer.
    • Expand a device category to reveal the devices below it.
  3. Then right-click on a device and press Update Driver.
  4. Follow the options you want and update the driver.
  5. Repeat the steps. 3 and 4 until you update all the drivers in the list.
  6. If you can, restart your computer after each driver update.
    • However, restarting the machine after all updates are complete also works.

5. Perform a system restore

  1. press the Windows key and search system restore in the Start menu
  2. From the results, select Recovery.
  3. Then choose the Open system recovery adjustment.
    • This starts the System Restore utility.
      <img class = "aligncenter size-full wp-image-472274″ alt=”open-system-restore-dropbox-error-400″ width=”681″ height=”500″ srcset=”┬┐Recibe-el-mensaje-de-error-400-de-Dropbox-Prueba-estas.png 681w,×220.png 300w,×210.png 286w,×88.png 120w,×103.png 140w,×47.png 64w” data-lazy-sizes=”(max-width: 681px) 100vw, 681px” src=”┬┐Recibe-el-mensaje-de-error-400-de-Dropbox-Prueba-estas.png”/>
  4. In the System Restore wizard, click next and then select a restore point that happened before you start getting Dropbox error 400.
  5. When the system restore is complete, restart your machine and re-create the error.

Follow the solutions closely to fix Dropbox error 400. Considering there are many causes of the error, you can try a few before you fix the problem.

If neither of these work, let's talk about it in the comments.

Frequently Asked Questions: Learn more about Dropbox

  • What can I store in Dropbox?

Dropbox can be used to store almost any type of file, regardless of format. The only limitation is that the file does not exceed the total storage space.

Dropbox offers a free subscription plan, but it comes with a fair amount of limitations.

Due to the fast download and upload speeds and the large amount of storage it provides, Dropbox is definitely a cloud storage service worth considering.

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