How Much Space Does a Windows 10 Backup Take | Find Your Answer Here!

To prevent the data in our computer from being lost or maliciously tampered with, we need to back up our data frequently. But a question many people have when backing up their data is how much space does a Windows 10 backup take. In this article, we will answer this question in detail. 

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Updated on Mar 15, 2024

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How much space does Windows 10 backup take? It is a question asked frequently asked in google. Many guides say that it depends on your needs and requirements. However, this answer is not clear. Therefore, we will aim to assist you in determining the size of space you will require for your specific circumstance to back up. What's more, I'll also go over how to use different ways to help you backup storage better.

windows 10 backup

The Space A Windows 10 Computer Needs to Backup 

We may have many important data such as documents, images, music, videos, or even disks in devices and drives to back up. If the space you prepared is insufficient, you will need to design a new one; in this situation, you may think about how much space is required to back up these data. This article will answer you in detail. The files you use greatly influence the space required for your needs, your online activity, and the material you produce. Consider these three crucial elements to make things simpler:

  •  All types of files are in one account. 

If you typically keep all types of files in your account, you should only use these examples as rough guidelines. A decent rule of thumb is to double the combined size of your current files by at least two to determine the storage you require. For example, if you have 250GB of files to back up, you will need at least 500GB of storage space.

  • The minimum space for backup.

You will want at least 16 GB of free space for your backup, regardless of whether you use a UBS drive or another disk. Although this is the bare minimum needed for Windows backups, keep in mind that the recovery drive's storage space is limited and that we can't back up personal files and third-party software.

  • The storage of a disk to back up a disk or a partition.

It simply divides the quantity of data you require by the amount of disk space available to determine the amount of storage you need for a Windows 10 backup. For backups, you typically require at least more than the volume of your PC. For example, if your computer's volume is 126GB, you may need 256GB space to back it up.

To find the capacity of a disk in your computer, you need to press the Windows logo key + E to open file explorer, and then click on the This PC icon on the window's left side to see how much storage space your external hard drive needs to have.

find the least space you need

In this case, the total space in Local Disk(C:) reported 196 GB, and free space is 76 GB, resulting in about 76 GB (196 GB - 76 GB) of storage space needed to back up everything.

🚩Further Reading: How to Backup Entire Hard Drive Windows 10

How to Save Disk Space with a Reasonable Backup Method

You need to use different backup methods to store a lot of space. Every alternative and strategy decision typically entails balancing cost, data retention, performance, and data protection levels. Here are some methods you can refer to.

  1. Use A Trustable Application to Save the Space on Your Disk
  2. Use Cloud Drive to Store your data.
  3. Using an External Hard Drive is Another Good Choice
  4. Use USB to Back up Your Data
  5. Time Machine Can Your Other Choice

Use A Trustable Application to Save the Space on Your Disk

A high-performance, easy-to-use Windows backup software can help us save disk space while increasing backup speed. EaseUS Todo Backup is a good choice. Here are some functions of it.

  • The best way to create backup compression. Compression of backups can help with storage space optimization. This method allows for compression, which reduces data size by reducing repetitions and redundancies, can be used. In other words, it can shrink the file size by better encoding the contents.
  •  Merge split file function. EaseUS Todo Backup Merge and Split feature can split a large file into several smaller files so that you can save disk space by backing up only the files you need instead of backing up the entire file. Or you can combine multiple files you need into one large file to save backup time.
  • Highly supports backup options. As the backup destination, you have three options: an external hard drive, manually entering the path to a network share or a cloud service. In the picture reserve strategy, you may specify you should retain how many days' worth of photographs. You can also decide whether to back up your data daily, weekly, or monthly. You can take advantage of more sophisticated features like Smart Backup, a global restore, or even clone disk free or partition if you upgrade to the premium edition. You can use it to do a full backup, incremental backup vs differential backup.
  • Pros:
  1. User-friendly
  2. Hassle-free refund
  3. An old brand for data backup and recovery
  4. Multiple different versions (Free, Home, Mac)
  • Cons: 
  1. Need to install a third-party application
  2. Will use an e-mail to regist

Use Cloud Drive to Store Your Data.

Many cloud service software on the market, such as Alibaba Cloud, Baidu Cloud, Google Drive, Dropbox, etc, can provide services to back up your data. 

cloud drive

  • Pros:
  1.  Large memory space
  2.  Free to use
  3.  Back up automatically
  • Cons:
  1. Unsafe ( Others can steal your account)  
  2.  Internet Needed

Using an External Hard Drive is Another Good Choice

You can also use the external hard drive to save your computer's space. There are many inexpensive external silver drives on the market, and you can use an external hard drive to store some of your essential files. But their price is often proportional to storage space, so instead of picking the largest external hard drive, choose the one that meets your needs. That means you don't need to buy a 2TB External drive if 500GB is enough. 

external hard drive

  • Pros:
  1. No Internet needed 
  2. Easy to carry
  3. Many size to choose
  • Cons:
  1. Expensive 
  2. Easy to lose or be stolen

Use USB to Back up Your Data

Using a USB stick also works. We can create system image windows 10 on usb to save space.


  • Pros:
  1. Small
  2. Cheap
  3. Convenient to use 
  • Cons:
  1. Not safe enough to store data
  2. Simple to misplace

Time Machine Can Your Other Choice

Apple's desktop operating system, macOS, uses Time Machine as its backup system. The software can be used with network-attached disks and local storage devices.

time machine

  • Pros:
  1. Automatically back up 
  2. Multiple backup frequencies to choose from
  • Cons:
  1. Expensive
  2. Easy to lose

The Bottom Line

After this passage, you may know how much space does a Windows 10 backup take. And How to use reasonable backup methods to save your disk capacity. I strongly recommend EaseUS Todo Backup Home since it is potent, and its free version can also fulfill many of your needs。


1. How large is a Windows 10 backup image?

A complete snapshot of everything on the computer's hard drive at any one time is included in the system image. The system image will be roughly 500 GB if a 1 TB drive has 500 GB of space. If you want to create system image windows 10 for another computer, EaseUS Todo Backup is a good choice.

2. How many GB does it take to back up a laptop?

Generally, we would say that a drive with 2TB to 4TB is more than adequate space for most average users. You'll need more storage capacity if you regularly work with video or huge Photoshop files. You may also want to consider a professional-grade raid array for added security and numerous backups of each file.

3. What kind of CD do I need to back up my computer?

It's simple to make a backup to a blank CD-R, CD-RW, DVD-R, or another writable disc, but you'll need CD/DVD writing software to write data to the discs. Every time you want to create a backup, you must put the CD for these backups into the computer. 

EaseUS Todo Backup

EaseUS Todo Backup is a dependable and professional data backup solution capable of backing up files, folders, drives, APP data and creating a system image. It also makes it easy to clone HDD/SSD, transfer the system to different hardware, and create bootable WinPE bootable disks.

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    Larissa has rich experience in writing technical articles and is now a professional editor at EaseUS. She is good at writing articles about data recovery, disk cloning, disk partitioning, data backup, and other related knowledge. Her detailed and ultimate guides help users find effective solutions to their problems. She is fond of traveling, reading, and riding in her spare time.…
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    Jean is recognized as one of the most professional writers in EaseUS. She has kept improving her writing skills over the past 10 years and helped millions of her readers solve their tech problems on PC, Mac, and iOS devices. …
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