I'm trying to use Macrium Reflect to clone a 68GB C: drive to a larger 1TB drive. This is on Win 7.

I'm getting the error 'Failed to create volume snapshot result code 0x8004231f'. Looking up the error it indicates that it is a VSS error insufficient storage space for shadow copy.

I saw a post and reply somewhere (not here) that suggested increasing the storage space for a shadow copy which I tried but the problem is that my current C drive is very nearly full with only around 200MB left so I restricted the increase to 20MB.

Does anyone know what sort of increase in vss storage I would need to get Macrium to work and how can I increase it by much if the disk is nearly full?