ICACLS Backup/Restore

Open an elevated cmd prompt.
Save

icacls E:\ /save "E:\ntfsDdrive.txt /t /c

Restore

icacls E:\ /restore "E:\ntfsDdrive.txt

From https://social.technet.microsoft.com/Forums/en-US/8299036a-3cfe-40d7-beb8-becd2e56c2f4/icacls-syntax-issues-with-backup-restore?forum=winserverfiles