A novice question, but about a problem that Support have been unable to find a solution for. So far I have been unable to get DD 10 to work and have received the error message "Invalid Partition Size". Looking at my defragmentation analysis have I perhaps found the problem? DD says I have 140 Gb free space on my 230 Gb C: partition. I want to create a new, say 100 Gb, D: partition from this space. However, when I run defragmentation it tells me at the end that there is only 90 Gb free space. Looking at the screen shot below there is data left out on a limb in this partition that no amount of defragmentation seems to be able to consolidate with the rest of the data in the partition. Perhaps from this point to the end of the partition there is only 90 Gb unused and hence available for reallocation. Am I on to something? And if so how do I get my C: partition to release the empty gap in the middle?