Go to Settings > Photos and enable iCloud Photos . On a PC or Mac, log in to iCloud.com to download full-resolution versions of your media.
If you only need to move a few specific photos, you can avoid cables and cloud setups entirely. How Do I Pictures From My Phone
For one or two images, you can simply email them as attachments to your own address and download them on your computer. Go to Settings > Photos and enable iCloud Photos