How can I download pictures from my iPhone to a thumb drive

Shihtzucody wrote:

How can I download pictures from iPhone to a thumb drive

You import from phone to pc/mac and then to thumb drive.

Transfer photos and videos from your iPhone, iPad, or iPod touch - Apple Support

It is possible to download to a thumb drive, but you will need a powered adapter as explained in here. Take a look at this.

Connect external storage devices to iPad - Apple Support