The SD3 DOWNLOAD location and SD3 INSTALLATION location are 2 different locations in the eyes of the installer,
even you put them on the same drive.
The Program Manager settings determine where the DOWNLOAD files are stored.
The Product installer will copy, expand or utilize the downloaded files to the INSTALLATION location.
Therefore, you will need to allocate twice the space required;
at least until the installation is completed after which the download files can be cleaned off the drive.
