folderClone.exe version 0.90.2.0,
last updated 6/19/2011

• Command-line utility to copy one folder to another
• emphasis on speed at comparison time to minimize total run time
• Compares file size, creation date, and modification date to compare files to ensure more files are found.
• It's a command line utility, so it can be scheduled to run in the task scheduler

• Microsoft.NET framework v2.0
• Operating Systems: Tested on Windows XP, Windows 7 & Windows 8; should be fine on Vista
• RAM: maybe 20MB
• Disk space: 80KB for the program itself, plus additional space for the copied files
• License terms: freeware

/DELETE​[:n]	This switch will delete files/folders in the destination folder that don't exist in the source folder /DELETE:0 do not delete files (default if switch not used) /DELETE[:1] Permanently delete files/folders (default if switch is used) /DELETE:2 Send deleted files to the recycle bin. This is safer, but much slower
/COPYALL	Copy all files regardless of file size and dates
/NOPROGESS	Do not display progress when copying files. This may be faster on some computers
/SUMMARY​[:n]	Determines which version of the summary to display /SUMMARY:0 - Always display the summary (default) /SUMMARY:1 - Only show the summary if errors exist /SUMMARY:2 - Never show the summary
/IFSE	Ignores folder security Errors when retrieving directory listings. This is needed if your directory contains a junction point (like your "My Documents" folder) because this program does not and cannot parse into junction folders.
/INFO	More detailed info about what the program does behind the scenes
/?	Help Screen

For a while, I was using XXCOPY /CLONE to backup files on my notebook to my desktop. It was fine and fairly fast, but it kept breaking when a service pack was applied, and I often wouldn't even know about it. I finally switched to ROBOCOPY /MIR, but that was just so darn slow when just comparing files (i.e. iTunes folder). So, I wanted to write something very specific that was as efficient as possible when comparing files, since more often than not, my backup will not copy files.