Installation of Windows 10 may comes with lots of error messages, one of them is Error 0x80070070. This error linked to the storage section of the PC or Laptop where you trying to install Windows 10.
In order to install Windows 10 you need minimum 30GB of free space on your PC, you can remove storage space on your PC with the following methods.
- Remove/Uninstall any unused software. (Go to the Control Panel > Programs and Features.)
- Move your content to any drive where Windows 10 will not be installed on.
You can also clear down your install drive using Disk Cleanup as given below.
Step 1: Click on the start menu -> browse to Explorer and the choose This PC
Step 2: Right Click on the C Drive and choose properties.
Step 3: Select Disk Cleanup option.
Step 4: After it t choose the options you want to clear down as seen below. Confirm that you empty the recycle bin, clear any temporary files and any error logs, after completion choose OK.
With the help of above given steps you can clear down your system files as you may have upgraded from Windows 7 to Windows 10 and left your old OS files in place.