Files Transfer from pc to iphone

You can do it using itunes and following this support guide, at section: "Get photos from your computer to your iOS device": Transfer photos and videos from your iPhone, iPad, or iPod touch - Apple Support

Regards

Giulio

You can sync your photos to the phone using iTunes. See the section about syncing photos manually with iTunes.

Keep your photos safely stored and up to date on all of your devices - Apple Support

Download iCloud for Windows - Apple Support