Why is the disk space consumed by the installation so much larger than the actual sizes of the files I am installing?
When launching an installation, Windows Installer calculates the space required by adding the size of the resources which will be installed with the size needed for rollback. Also, some space is required for the installation script and for the cached package. Additionally, the installation runs from a temporary copy of the package, therefore more space is required. Basically, an installation requires much more space than just the size of the files it creates.
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- Why is the disk space consumed by the installation so much larger than the actual sizes of the files I am installing?
