USBFlashCopy is a small and smart portable utility that allows copying USB drives on the fly. It automatically detects removable drives inserted into the computer and copies all files to the local directory "My Documents\Removable Media Backups". This way you can create safe backups with supports for incremental backups and the option not to overwrite old files. You can configure many settings and options for more specific actions and drive letter customization. The program offers a stealthy spy mode for silently copying files without any notifications, commands or suspicion but requires license key for this feature.