Re: Can't convert Server 2008 R2 Machine getting error: The VSS snapshots cannot be stored because there is not enough space on the source volumes or because the source machine does not have any NTFS volumes. Error code: 2147754783 (0x8004231F).

To add a couple more cents, I had this problem too, on a Samsung EVO 850 as well.

I had cloned it with the Samsung software and I now suspect that was the cause of our common problem.

Expanding the partition by 100Mb (to 200Mb) was enouth to sort the issue.

My thanks to pkdavidson!