Hi Liam,

If your hard drive shows less space than what it actually has (in your case showing 80GB instead of 500GB), you can follow the below methods and it should work for you:

Method 1: Perform Disk Cleanup and check
One of the easiest ways to clean up files you no longer need is by using Disk Cleanup. Follow the below steps to do so:

1. Open Disk Cleanup by clicking the Start button . In the search box, type Disk Cleanup, and then, in the list of results, select Disk Cleanup.
2. If prompted, select the drive that you want to clean up, and then select OK.
3. In the Disk Cleanup dialog box in the Description section, select Clean up system files.
4. If prompted, select the drive that you want to clean up, and then select OK.
5. In the Disk Cleanup dialog box, on the Disk Cleanup tab, select the check boxes for the file types that you want to delete, and then select OK. To remove data from a previous installation of Windows, select thePrevious Windows installation(s) check box.
6. In the message that appears, select Delete files.
7. Go back to Computer in File Explorer, select the drive you cleaned up, and then select Refresh.

Method 2: Unhide the hidden and System Files.
The Windows Explorer display above was using the default settings which do not display files marked as "hidden" or "system", and as a result they are not included in the calculation.

Most notably that included the system swap file and hibernation file, both of which are large, and marked as hidden.
To change the settings, you can follow the steps below:

• Go to Windows Explorer, and then:
• Click on the Tools menu
• Click on the Folder Options... menu item
• Click on the View tab
• In the Advanced Settings list, scroll down until you see both Hidden files and folders, and Hide protected operating system files.
• Now delete any hidden images, files that are not necessary for you.

I hope this helps.

Regards,
Lokesh