This defines the filename the transferred file will be saved as, or read from, on the switch/device itself, defaulting to match the remote filename unless the admin overrides it. This is useful when an admin wants to save an incoming firmware image or config file under a different local name, for instance to keep multiple firmware versions side by side on the device's flash instead of overwriting the active image. A value like 'backup_config_2026.cfg' would let the admin retrieve a config dump under a name distinct from the source file.