Save images directly to external drive, usb flash.

Connect an external drive to iPhone or iPad:

https://support.apple.com/guide/iphone/external-storage-devices-iph95baac91f/14.0/ios/14.0

In the app, MENU > POINTS > Select > select points and tap on the bottom left Action button > Share only images > Originals.

Or for the whole point collection do MENU > POINT COLLECTIONS > Tap on a settings button for the collection to save > Action button > Share only images.

You may need a lighting to USB adapter to connect an external drive to iPhone or iPad with a lighting port.