I'm transferring and backing up data from old to new computer. I made a time machine backup and when I compared the files in each they are different. Note that I made the backup less than 10 minutes before transferring the folder. Example: Hard Drive: /Macintosh HD/Users/Me/Library Folder is 42.2GB with 130,432 items. Time Machine Backup: /Macintosh HD/Users/Me/Library Folder is 39.86GB with 112,825 items. Created and Modified dates are exactly the same for both folders. Why is there a difference?