CopyFiles [size_of_files_in-kb] meaning

Does the [size_of_files_in-kb] param to CopyFiles mean the total number of KB that this instruction will copy for potentially multiple folders and files is limited for this instance to that number as a maximum number of KB's?

As far as I understood, the last parameter of CopyFiles is a hint for NSIS to approximate the disk space requirements of the installer.

Nothing more. Nothing less.

"The last parameter can be used to specify the size of the files that will be copied (in kilobytes), so that the installer can approximate the disk space requirements."

It never says that it will stop copying after said approximation is reached. So no, it will not do that.