Download the shareware version of Directory Replicator.   This utility creates or maintains an exact duplicate of the original directory.    If the directory already exists, Directory Replicator will compare the mirrored directory to the master directory and correct any disparities.  Directory Replicator allows ultra fast maintenance of USB disk backups because it performs incremental updates.  In other words it only copies files that have changed.  If only a few files have been updated, it performs very fast.    Directory Replicator also performs binary comparisons to verify that two directories and all of the files contained within them are the same.  Directory Replicator is meant to perform the following tasks:

• - Fast maintenance of backup images located on removable drives. Such as a USB drives.
• - Scheduled timer interval in minutes from the command line
• - Command line support with background timer setting.
• - Perform binary comparisons.
• - Comparing directories for mismatches and/or replace any mismatches.
• - Create safer backups by not merging everything into a single file.
• - Remember settings from up to a dozen previous sessions.
• - Windows 10 Support