Why did the installation of a game get cancelled due to lack of free disk space?
Since the harddisks nowadays have much more disk space than the ones back then, the available space will be limited after mounting a drive in DOSBox in order to avoid problems using old software. It should be enough in most cases, but it might happen that it’s too little for some games. In that case, append the following argument to the mount command: -freesize 1024 (described in the DOSBox Wiki). This will increase the free disk space to 1 GB.