The Windows 11 ISO file is 4.5GB in size. This isn’t great for a desktop OS but during installation, or if you’re upgrading from Windows 10 to Windows 11, the files in the ISO expand and when done, take up much more than 4.5GB of space. Free disk space is crucial when installing any OS and Windows 11 is no exception.
Error code 0x80070070 updating to Windows 11
If you are upgrading to Windows 11 from Windows 10, and the error code 0x80070070 breaks into the update process, it means that you have a storage space issue. In particular, you have low disk space on your Windows drive. You first need to free up space on the driver, and update the OS.
If so, you should have 20GB of free space on a Windows driver to prevent problems during updates.
How to free up space to install Windows 11
If you want to free up space on Windows 10 so you can upgrade to Windows 11, there are a number of easy ways to do just that.
1. Download empty and recycle bin
The Recycle Bin stores unlimited files. It will not automatically remove them after a certain time. As long as files are in the Recycle Bin, they will continue to take place on your driver. They will not leave your system until you remove them from the Recycle Bin.
- Right click on the recycle bin.
- Choose Empty recycling bin from the context menu.
- Wait for the files to delete.
You should also check the Downloads folder. You have to do this manually. Remove anything you no longer need. Move the items you need to a different driver.
2. Remove temporary files
Temporary files can take up several GBs of space on your drive. These files are often residual files after previous updates have been installed.
- Open the Configuration application with keyboard shortcut Win + I.
- go to System.
- Choose Storage.
- Click Temporary files.
- Click Remove files.
3. Install Unused Apps
If you have apps installed on your system that you are not using, remove them. They may look like small apps that don’t take up much space, but if there are a large number of them, you can lose a lot of space.
- Open the Configuration application with keyboard shortcut Win + I.
- go to Apps.
- Select the Apps Tab & Features.
- Sort apps by size.
- Go through the list to see what apps you don’t use.
- Select an app.
- Click Uninstall.
- Repeat for all apps do not use.
4. Clean documentation and photo library
If you are still under space pressure, consider moving files from the Document and Image library to a different external or internal drive. If you have a large music collection, and it is stored on your Windows driver, move it to a different driver as well. You can move it back once you have successfully upgraded to Windows 11.
Conclusion
Microsoft does not tell you how much free disk space you should have on your driver before installing a key feature update for Windows 10 or how much free disk space you should have before trying to upgrade to Windows 11. That said, the 20GB is a safe value. You can always have more free space and it won’t hurt you but try to have at least as much. On that note, if you’ve managed to free up a few GBs of space but can’t make it to 20GB, you can try the update again and it may work.
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