Remove the snapshots from that particular VM and following the procedure:
Extending a vSphere VM Virtual Disk
To got started, open the vSphere Client and click on the VM that you want to extend. Click to Edit Properties on the VM to be extended. On the Hardware tab and then on the virtual disk you want to extend (such as “Hard Disk” 1 (shown in figure 2).
Figure 2
On the right side of the window, you’ll see the current size and, assuming you have met the requirements, you’ll be able to resize this up to the maximum size that the datastore has available. You can make this change with the virtual machine up and running, causing no harm to the OS or the running applications. In fact, the OS doesn’t immediately recognize the larger (virtual) disk until you tell it about it (which we are about to do, below).
Using the Extended vSphere VM Virtual Disk in the Windows OS
With the virtual disk expanded now you need to tell Windows about it and make use of it. To do this, first go into Computer Management, under Start -> Administrative Tools. Here, under Storage, click on Disk Management.
Figure 3
Assuming you just have 1 disk, click on that disk (likely “Disk 0”) and you should see that there is now “unallocated” disk space.
Right-click on the allocated piece of the disk and click Extend Volume, as you see in Figure 4.
Figure 4
This will bring up the “Extend Volume Wizard”, shown in Figure 5.
Figure 5
You’ll use the Extend Volume Wizard to first select the disk that you want to extend (on the left) and then clicking Add to move it to the right (the selected side). Click Next.
Figure 6
Likely it should only take a few seconds and you’ll see that the disk has been extended to the full size of the vSphere virtual machine disk, shown in Figure 7.
Figure 7
Now if you go to My Computer, you should also see there that the C:\ disk (the root drive) has now been extended to the maximum size of the virtual disk. Keep in mind that this disk may still be a thinly provisioned disk (as it was in the example above) and may not be filling up the full amount of space in the VMware VMFS file system as is shown in the Windows OS.
Figure 8