I have a very active data disk that was unfortunately formatted as MBR in Windows 2008 R2. It is quickly approaching the 2TB limit. I’m considering something like AOMIE Partition Assistant or Terabyte BootIt Bare Metal. Both seem to convert from MBR to GPT but I am worried about doing it on a volume that is actively being used and so close to the 2TB limit. The volume is actually at the 2TB limit and only has about 200GB of free space. Does the amount of free space make a difference? Any real world experience converting MBR to GPT with either of these tools?