Q: Photos to a SD card

You would need to import them to your computer, then you can put them wherever you like.

You should probably read the manual.

You import them as you would from any digital camera.

On a Mac.  Open photos, connect iPhone, import photos.

Just connect your iPhone to you computer with your USB cable, or you can send it over Airdrop if you have a Mac computer.

Do you have a Mac or PC?

You don't use iTunes to import your pics.

Import photos and videos from your iPhone, iPad, or iPod ...

Read this article of how import photos from Windows: Import photos and videos from your iPhone, iPad, or iPod touch to your Mac or Windows PC - Apple Support. Or using Photo Stream: My Photo Stream FAQ - Apple Support

Hope this helps )