By Nicky / Last Updated July 30, 2020

What is the C drive on my computer?

Drive C (C:) is the main hard disk partition that is used for storing the operating system, system files, and other applications and their related files. In later versions of Windows, the C: drive is marked as "Master Drive" or "Local Disk" and can be accessed by opening the "My Computer" folder by default.

Can I backup C drive to OneDrive?

“I am going to backup my C drive so that I can recover my Windows 10 operation system directly instead of reinstalling Windows 10 on my computer, or restore the OS on a new computer when the old one dies. I think OneDrive is a good backup destination for C drive, can I backup C drive to OneDrive? Can you give me some suggestions? Thanks!”

OneDrive is a cloud storage service provided by Microsoft. It is specifically for storing documents and files that are important for you. However, computer settings and applications cannot be saved, meaning that OneDrive cannot backup Windows 10 system to OneDrive directly. But don’t be upset, you can learn how to backup your C drive files to OneDrive to protect the files that are crucial for your computer in the following contents.

Why backup C Drive files to OneDrive?

Since C drive contains the system operation and system-related files, it is important to backup C drive in Windows 10, 8, 7 so that you can recover your system operation and related files when you encounter terrible situations like virus attacks, system crash, disk bad sector problem, natural disasters and so on.

In the past, most users prefer to backup C drive to external hard drive just in case. But nowadays, users are suggested to backup C drive to cloud storage like OneDrive because backing up C Drive to the cloud storage has many advantages.

For example, cloud storage will automatically backup your files without the disadvantage of always plugging in an external hard drive. Besides that, cloud storage is regarded as safer than external hard drives. The data stored in cloud storage is far away from your local hardware so you don’t need to worry about the problem of hardware failure.

And data stored in cloud storage can be accessed easily. If there is anything wrong with your system or important system files, you can restore your C Drive files from OneDrive anytime, anywhere. What’s more, compared with the external hard drive, the price of cloud storage is more affordable. And OneDrive can offer enough backup space for your C drive as long as you upgrade your account for larger capacity.

How to backup C drive files to OneDrive in Windows?

There are three methods for backing up files to OneDrive, you can choose one way to follow. But you should make sure that the storage space of OneDrive is enough to contain all the files that you want to back up. If 5GB of storage isn't enough, you can grab an Office 365 bundle that comes with 1TB of OneDrive storage or grab 100GB for about $2 per month directly.

Method 1. Backup C drive files to OneDrive with desktop app

The Folder Protection feature of OneDrive allows you to verify the local folders that you want to backup to OneDrive automatically. You can set to backup your C drive folder to OneDrive cloud with the steps below:

1. Open the OneDrive app on your Windows PC. Right-click inside the OneDrive folder that opens, and left-click on Settings.

2. Go to the Backup tab and Choose Manage Backup.

Manage Backup

3. In the Back up your folders dialog box, you can choose to backup the "Desktop, Pictures, Documents, and User folder, and then click "Start Backup" to backup files to OneDrive.

Folder Backup

Method 2. Backup C drive files to OneDrive via File Explorer

As you know, after installing, OneDrive will create a desktop folder on your computer and you can drag and drop files to this folder directly to let OneDrive automatically sync these files to the cloud. Therefore, you can copy and paste your C drive files to this OneDrive folder to backup your files to OneDrive.

1. Type OneDrive in the search bar and open your OneDrive folder in File Explorer.

OneDrive in File Explorer

2. Copy your C drive files and go to the OneDrive folder to paste them. Then, OneDrive will backup these files automatically.

Method 3. Backup C drive files to OneDrive via third-party tool

Some third-party tools can help you backup C drive files to OneDrive directly and automatically. Here, we will take a free third-party tool - AOMEI Backupper Standard as an example to show you how to backup C drive to OneDrive with ease.

1. Open your OneDrive desktop application. Then download AOMEI Backupper Standard, install and launch it.

2. Run AOMEI Backupper Standard and click "Backup" tab. Scroll down your mouse to find "File Sync" and click it.

File Sync

3. Edit the task name if necessary. Click "Add Folder" to select the folders you’d like to sync on the C drive. Click the drop-down icon and choose "Select a cloud drive". In the pop-up window, select OneDrive and click "OK". Then, click "Start Sync".

Choose Destination

Bonus tip: How to protect your C drive files in OneDrive

The C drive files that stored in OneDrive may be really important for you. However, the files in C drive are still at risk of loss due to human error or technical problems. Therefore, you are suggested to do a cloud to cloud backup with cBackupper to protect your files just in case.

cBackupper is a cloud to cloud backup service that supports many cloud storage like Dropbox, OneDrive, Google Drive, etc. With just a few steps, it can help you backup files between cloud storage quickly and easily. To backup OneDrive files to another cloud storage with cBackupper, please refer to the steps below:

1. Create an account and sign in. Just go to the main page of cBackupper, click “Sign up” at the upper right side, then type your email, password, and name. After that, sign in your account.


2. Click “Add Clouds” under “Clouds” tab, select your clouds and click “Add”. Then sign in your account and authorize cBackupper to access and manage your files on the cloud.

Add OneDrive

3. To backup files between cloud storage, click on “Tasks” tab at the top of the page, then, click “Create Task” button. Name your backup task, click “Add Source” button to add one cloud storage as the backup source, and click “Add Destination” to another cloud storage.

Create Task

4. Click “Start Backup” in the lower right corner to execute the backup task.

OneDrive to Google Drive


You can follow the methods above to backup C drive to OneDrive with ease. Don’t forget to backup your files in OneDrive under the help of cBackupper. Besides cloud to cloud backup, it also allows you to add multiple accounts and merge OneDrive accounts to combine a huge backup space for your files.