Hi, thank you for contacting us. The SANDISK Extreme PRO Dual Drive 256GB has both USB-C and USB-A connectors, so you can connect it to your iPhone 17 Pro Max and your older HP computer.
You can transfer photos from your iPhone to the drive using the Files app and the SANDISK app, connect the drive to your HP computer, and copy the photos onto it. You can also copy photos from your computer to the drive and then transfer them to your iPhone.
This lets you move photos in both directions, or you may also move the data between both the iPhones using the USB Type - C connector of the flash drive. For help with the transfer steps, please refer to the link (https://support-en.sandisk.com/app/answers/detailweb/a_id/50917) and (https://support-en.sandisk.com/app/answers/detailweb/a_id/52507)