I posted this in the Windows on the Mac forums, but I realized that it's really an OSX issues, not a Windows issue. I'm trying to move a 40GB VM from my HDD to my SSD (HDD in regular spot, SSD in Optibay), and "Can't copy [filename] because there isn't enough free space". There is about 90GB free, and the VM is 40GB. The SSD is my boot drive.