ISO file Windows 11 4.5 GB in size, which is not too big for a desktop operating system but during the installation process or if you are upgrading from Windows 10 to Windows 11, the files in the ISO will be split into files and when they do, they take up 4.5GB more space. Free disk space is essential when you install any operating system and Windows 11 is no exception.
If you are upgrading to Windows 11 from Windows 10 and the upgrade is interrupted by an error code 0x80070070, that means you have a storage problem. Specifically, you are running out of disk space on your Windows drive. You need to free up space on the drive first, then upgrade the operating system.
Ideally, you should have 20GB of free space on your Windows drive to avoid problems during the upgrade process.
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 few simple ways to do it.
Clean Recycle Bin
Recycle Bin stores files indefinitely. It will not automatically remove them after a certain period of time. As long as the files are in here, they will continue to take up space on your drive. They don’t leave your system until you delete them from the Recycle Bin.
- Right-click the Recycle Bin.
- Choose Empty Recycle Bin.
- Wait for the files to be deleted.
You should also check the directory Downloads. You will have to do this manually. Delete anything you don’t need anymore. Move the items you need to another drive.
Delete temporary files
Temporary files can take up several GB of space on your drive. These files are usually files left over after previous updates have been installed.
- Into the Settings > System > Storage.
- Click Temporary files > Remove Files.
Uninstall unused apps
If you have apps installed on your system that you don’t use, delete them. They may seem like small apps that take up little space, but if you have a large number of them, you could end up wasting a lot of space.
- Into the Settings > Apps > Apps & Features.
Select the option to sort apps by size.
- Go through the list to see which apps you don’t use.
- Select an application.
- Click Uninstall.
- Repeat for all apps that you don’t use.
Document and Photo Library
If you still don’t have more free space, consider moving files from your Documents and Pictures library to an external drive or another internal drive. If you have a large music collection and it’s stored on your Windows drive, move it to another drive. You can migrate it back after successfully updating to Windows 11.
Microsoft doesn’t tell you how much free space you should have on your drive before installing a major feature update for Windows 10, or how much free disk space you should have before attempting to upgrade to Windows 11 That said, 20GB is a relatively safe amount of free space. You can always have more free space and it won’t hurt you but try to have at least this. Note that, if you’ve tried to free up a few GB of space but you can’t get it to 20GB, you can try upgrading again and it might work.