How can I get onto a iPhone when I don't have the passcode?

My sister passed away over a year ago and I've been meaning to find a way of how to get onto her IPhone 5s for ages now. She has loads of photos and videos on there, just tons of memories, that I want to see. Is there a way to can get onto there without deleting everything?

Sorry but that isn't possible, Apple wouldn't help you either as it's not your device. If they did then anybody could steal a device and claim it's a dead relative's phone and have them unlock it.

Use file explorer on a PC

Apple is VERY fussy, but if you provide them with PROOF of death, etc, they MIGHT unlock the phone for you. They would know who the device is registered to, and you would have to prove a relationship. They typically have a waiting period for unlocking. Nothing like this happens in a hurry with Apple