You can determine whether your virtual disk is in thick or thin format.

1

In the vSphere Client inventory, right-click the virtual machine and select Edit Settings.

2

Click the Hardware tab and select the appropriate hard disk in the Hardware list.

The Disk Provisioning section on the right shows the type of your virtual disk.

3

Click OK.

If your virtual disk is in the thin format, you can inflate it to its full size.