Backing up PlaneBase to an external hard drive

[graham]

I've used Planebase now for about five year, it backs up automatically to my laptop everytime there's an update which is usually twice a week. Of course, should anything happen to the laptop, then those files will be lost. I've therefore bought an external hard drive in order that I can do a secondary back up and therefore, should the laptop decide to meet its maker, my PB logs will be safe.

I need to set up a file path to the external drive so that when the programme backs up to the laptop, it'll also back to the external drive. Does anyone know how I would do this please?

There's no practical guide in the PB manual that I can see.

Thanks to anyone who might be able to help.