Success probability of 3 Tb snapshot removal if system itself takes about 3Tb and there's left only about 70 Gb space on the VMFS5 partion (vSphere 5.1)

Hello.

I have a problem... VM located on vSphere 5.1 VMFS5 storage partition has 3 vmdk files (1 for each data partition in windows 2008 server, ~1Tb each). There were snapshot taken from this system, which currently used nearly all available space on the storage partition. I need to remove this snapshot as it is no more needed, but doubt if there's enough free space left on this partition to detele snapshot (~70Gb left). Would I be able to successfully remove snapshot or have I before this operation migrate VM to another VMFS5 datastore with more space on it?