So how do you copy it anyway?

We can use it to backup a single file by passing in the filename argument at the end.

For this, we’ll want to add a couple of command-line arguments.

Backup/Copy Files that are "In Use" or "Locked" in Windows (Command Line)

/full

Copy all files

/skipdenied

Ignore any access denied messages because of permission errors.

/statefile=filename

This flag specifies the file that contains the last backup information.

/incremental

Only copy files that have changed since the last full copy.

After that you’ve got the option to launch the incremental backup with the /incremental switch.