By Kelsey twitter/ Last Updated March 22, 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.

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

Get Started

OneDrive Upload Failed: Sign in Required!

“OneDrive Upload Failed: Sign in required. Your changes were saved but could not be uploaded because you are not signed in to the server. Every time I have tried to save an Excel file or Word document in the last month I get this message and apparently I can't save to my one drive through the application interface. Why is OneDrive not working? How to solve my Word upload blocked? Help!”

OneDrive Upload Failed Sign in required

Quick Navigation

Why is OneDrive Not Uploading?

OneDrive is an Internet-based storage platform. Microsoft users can use it directly on the device and use it as a shared cloud hard drive. Whenever you want to save a file in all Office apps or save it as a new copy, the program sends a request to log in with a Microsoft account for each file. After entering the user name and password credentials, the following error message may be displayed:

Upload Failed: You are required to sign in to upload your changes to this location.

OneDrive Upload Failed You are required to sign in

Upload Failed: Locked by another user.

Onedrive Upload Failed Locked by another user

Upload Failed: Permissions issue.

OneDrive Upload Failed Permission issue

Upload Blocked: We couldn’t verify you have the necessary permissions to upload the file.

OneDrive Upload Blocked

OneDrive upload failed: There is a problem with the website's security certificate.

There is a problem with this websites security certificate

SIGN IN REQUIRED: We can't upload or download your changes because your cached credentials have expired.

Sign In Required

The above are some common situations that OneDrive cannot upload files normally. Why does OneDrive upload failed? Several reasons may cause them to happen:

  • The version of the running Office application is too old.

  • During file transfer, the connection to OneDrive was lost.

  • You are not logged into your OneDrive account on the app.

  • You do not have permission to access the file or upload the file to the selected folder.

How to Fix OneDrive Upload Failed: 9 Solutions

"How do I fix a failed OneDrive upload?" Usually, it is some small details that make OneDrive not uploading files. This is not difficult to solve. Let's try the effective methods provided here to fix the OneDrive upload failed on Mac and Windows PC.

Method 1. Re-provide account credentials

In the process of uploading files to OneDrive, if you are not logged in to your account, or your account is disconnected from OneDrive, you cannot continue the next operation. First, make sure you have logged in to your account. If you have logged in to OneDrive, try the following steps to re-provide account credentials to Microsoft Office:

Step 1. In any Office app, select File on the menu bar, and click Account. Under User Information, sign out all accounts. Then close all Office applications.

Sign Out Account

Step 2. Navigate to Control Panel > User Accounts > Credential Manager, Click Windows Credentials, expand Office credentials under Generic Credentials, and click Remove link.

Office OneDrive Credentials

Step 3. Then go to the Office application and log in.

Method 2. Delete cache

Whenever you use Office to save a file, a copy will be generated and stored in the cache folder. When an excel upload failed on OneDrive problem occurs, it can be considered that the cache fills up and the cache needs to be cleared.

Step 1. In the Start menu, search for Microsoft Office tools, click on it, and select Office Upload Center.

Office Upload Center

Step 2. Click Settings, under Cache Settings, check the box as shown in the figure, and then click Delete cached files.

Delete cached files

Method 3. Install the latest Windows updates

Unable upload to OneDrive has been fixed in version 16.0.7870.2031 or higher. If you are running a lower version, you can manually update to fix the problem immediately.

Step 1. Open the Settings on the computer, click Update & Security> Windows Update, and then click the Check for updates button.

Windows Update

Step 2. Open any Office application, then click File > Account > Update Options > Update Now.

Office Update

Method 4. Check the size of the file


If you do not follow the upload size limit of OneDrive files, it may cause that OneDrive failed to upload. What is the maximum file size to upload to OneDrive? You need to follow the following file upload principles.

  • If the file size you are trying to upload exceeds 20 GB, the process will fail.

  • If you use the latest version of Microsoft Edge or other popular web browsers, the upper limit for uploading files to OneDrive is 100GB.

  • If you are using an old browser, you can only upload files up to 300 MB.

  • OneNote notebooks saved in OneDrive are limited to 2GB.


You can upload files up to 100GB using the OneDrive app. If you log in with your work or school account, the maximum file size you can upload is 15GB. For uploading large files to OneDrive, it is recommended that you add files through the OneDrive desktop application instead of using the Upload button on the website.

Method 5. Check if the file contains restricted characters

If the file name contains prohibited characters, the file cannot be uploaded to OneDrive. The file name cannot start or end with space, end with a period, and can not contain any of the following characters: / \ <>: *"?|

The following names are not allowed for files or folders: AUX, PRN, NUL, CON, COM0, COM1, COM2, COM3, COM4, COM5, COM6, COM7, COM8, COM9, LPT0, LPT1, LPT2, LPT3, LPT4, LPT5, LPT6, LPT7, LPT8, LPT9.

If your file is included in the above situation, you need to change its name and upload it again.

Method 6. Check the file path

OneDrive upload blocked maybe because the full path of the file is too long. The path must be less than 442 characters. You can shorten the file name or the name of the subfolder in OneDrive, or select the subfolder of the upper level to upload.

Method 7. Check the file permission

If the file is being opened from another program. You need to save all changes to the file and close the program, then try to upload the file again.

If you try to upload a file to OneDrive from a removable media device such as a CD or USB flash drive, the file may not be available. You should make sure that the removable media device is properly connected to the computer, then try to upload the file again.

Method 8. Upload files to OneDrive in another free way

You may inevitably encounter tricky OneDrive problems. Here we recommend a free OneDrive alternative - CBackup, it can replace the OneDrive client for free and automatically back up the files on your Windows PC to your OneDrive account. This professional cloud backup service will be more stable. You can easily upload data to OneDrive through the following steps:

Step 1. Download, and install CBackup, create a new account to log in to CBackup.

Download CBackup Win 11/10/8.1/8/7/XP
Secure Download

Sign In

Step 2. Click My Storage > Add Cloud, select OneDrive, click the Add button to continue. Then, grant access to CBackup to manage OneDrive files.

Add Cloud

Step 3. Click Backup Tasks and New Task in turn.

Create Task

Step 4. Modify the Task Name to differ from others, tap Local Files > Add Source to select the files from your PC, then click Add Destination > Single Cloud > Next > OneDrive > OK.

Add Source

Step 5. If you wanna set the OneDrive PC auto backup, click Settings in the lower-left corner of the interface, and set the frequency or specific time you want to automatically backup under the Scheduler tab.

Schedule Backup

Step 6. Finally, click the Start Backup button to confirm, and you could avoid the upload blocked on OneDrive permanently.

Start Backup Files To Onedrive

Note: CBackup also offers CBackup Cloud with 10GB of free storage, which allows you to back up more important data for free.

Method 9. Check storage space of account

If the size of the file you want to upload exceeds the available storage space in your OneDrive account, the upload cannot be successful. You can go to the storage page to check the remaining space.

There is a free way for users to get more OneDrive space, which is to connect multiple OneDrive cloud storage or other cloud services through CBackup, merge their storage space to obtain a large backup space for free, and you can back up more files with only one login. If you have enough accounts, you can even get unlimited online cloud backup space.

Backup OneDrive in advance for data security

When there is a problem with OneDrive, such as OneDrive isn't connected, OneDrive not running, to avoid being unable to access the stored data or losing data, you can back up the files in OneDrive in advance.

You can use CBackup to back up files in OneDrive directly to another cloud drive. You can perform the following operations on the CBackup website or CBackup desktop app, here we take backing up OneDrive to Google Drive with more free cloud storage as an example:

1. Sign in to CBackup website with your registered account. If you have already downloaded the CBackup desktop app, then you can also do the following on the client. 

Sign Up

2. Add and authorize your OneDrive and Google Drive accounts under the My Storage tab. Then use the same method to authorize any cloud storage account you want to add.

Add OneDrive

3. Click the Backup Tasks tab at the top, then click New Task to create a backup task.

Create Task

4. Click the Add Source button to select OneDrive as the backup source, and click the Add Destination button to add Google Drive as the transfer source and backup destination.

Add Source Destination

5. After selecting, click Start Backup to start the task.

Migrate OneDrive to Google Drive

Besides, CBackup can help you to perform cloud backup more powerful with the following features:

  • Backup files to Google Drive, OneDrive, Dropbox, CBackup Cloud, even the combined cloud easily. And you could enjoy the schedule backup, email notification, and file filter, etc.
  • Offers 10 GB free cloud stroage space of CBackup Cloud.
  • Sync one cloud to another with everything moved, there is no need to download and re-upload, quite efficient.


To solve the OneDrive upload failed and blocked issue, you can try the above methods that suit you according to the possible causes of the problem listed in the article. Also, as a OneDrive user, if you want to ensure the safety of the stored data, you may want to backup OneDrive directly to another cloud drive via CBackup.

Get Unlimited Cloud Storage for Free to Protect Files with CBackup

Learn More