FTP share USB hard disk

i’ve installed hass.io.
I’d like to use ftp server on my raspberry to transform it in a server to store surveillance videos on a external hard disk connected via usb.
How can i do it?
Is the ftp server component useful for my goal?


I’m having thoughts of a similar setup. I have a rpi 4 and a 1 tb external hdd. Don’t know where to start really. A FTP server on the pi is simple to set up with an addon, but how to mount the drive?