How to i move the default save\project directory from the C:\Users\Public\Documents\Unity Projects that it set to. I have a 64GB solid state hard drive for my C: drive and only want my OS on it. I am putting all my programs on my 2TB Drive. The program did install Unity at the location i requested except for this portion. I checked preferences and there is no option. I am using the 2.6.1 free version.
Sounds like this is no Unity specific problem, but a more general problem with your Windows installation: You have your users directory located on C:. If you want to have only the OS on C: without the user directory, then you must move the user directory to e.g. D:
Google for something like "move user directory" to see how this can be done for your OS.