I had to uninstall the material library from my C drive. I have a dedicated SSD OS drive with very little extra space to spare.
Now that I need the material library again, when I try to install it, the installer still insists on using 1.2 GB on C.
I've browsed for the new drive letter, and the little pop up window still shows it using no space on any other drive, and 1.2 on C.
Is it possible to change this?
I'm not even sure that I have anything non critical on C that I can uninstall anymore.
You should be able to create a folder on your server and move the data there. Once moved go the the R (upper left corner) --> Options.
Under the Options menu there is a Rendering Tab that you can add a location for custom materials and material images.
Also, you may have to add that same path to the File Locations Tab under Places... button.
Hope this helps you out.