Turn on icloud in your phone turn on upload photo stream in your phone
install icloud on your pc sign in, and all your photos will download to your pc also when your iphone is connected to your home wifi it will upload to the icloud and sync back to your pc.
if you have alot of photos filling up your phone you can turn on optimize photos and then they all move to the icloud and you can still see them on your phone. Icloud only gives so much free storage so if you dont have enough you may have to buy storage at a cost of 1.29 per month for 50 Gigabytes. this information provided by Traci from ealingpc.com located in Souris MB .
you will need to know your apple ID and Password to set it up
Icloud download
https://support.apple.com/en-us/HT204283