Abstract: A system, method, and computer-readable medium are disclosed for improved identification of sources of files. In various embodiments, files are downloaded from one or more locations or sources to a user device. The sources can be local sources to the or on the user device. In certain cases, the sources can be from sites or networks. The files can be part of a software update package. Meta-data extensions are added to the copied files that indicate the source that the files are copied from. In certain implementations, other meta-data extensions are added to the files. The files with meta-data extensions are stored. The files with meta-data extensions can be retrieved when there is a need to determine where the files were originally copied from.