* Time Machine identifies the 1 MB of file changes, copies those changes to a new file on the backup drive, and keeps both the new backup file and the original backup file. * Time Machine identifies the 1 MB of file changes, copies those changes to a new file on the backup drive, then creates a 500 KB parity file, and keeps all three files: the two new files representing the 1 MB of fileĬhanges, and the original backup file. * Time Machine copies the 6 MB file to the backup drive, and keeps both the new backup file and the original backup file on the backup drive. * Time Machine copies the 6 MB file to the backup drive, and deletes the original backup copy of the file from the backup drive. How does Time Machine perform this backup? It is about to be backed up by Time Machine again. Today the file was edited, and has grown to 6 MB. A new 5 MB file was backed up by Time Machine yesterday.
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