how do i download all photos from Photostream to a portable storage device?

Hi there Darkmom05,

You can learn more about the My Photo Stream shutdown and what to do with your photos using these details from Information about the My Photo Stream shutdown:

What do you need to do?

Check whether you use iCloud Photos on all of your devices. If you don't use iCloud Photos, you can save photos currently in My Photo Stream to your device. To keep your photos synced across your devices, you can turn on iCloud Photos. 

Check whether you use iCloud Photos 

* On your iPhone or iPad, go to Settings > your name > iCloud. Make sure that it says "On" next to Photos on each of your devices. 

* On your Mac, choose Apple menu  > System Settings, click your name, then click iCloud. Make sure that it says "On" next to Photos on each of your devices. 

If you don't use iCloud Photos

The photos in My Photo Stream are already stored on at least one of your devices, so as long as you have the device with your originals, you won’t lose any photos as part of this process. If a photo you want isn't already in your library on a particular iPhone or iPad, make sure that you save it to your library on that device. Or, you can set up iCloud Photos. 

Save photos currently in My Photo Stream on your iPhone or iPad

1. Open Photos and tap Albums.

2. Tap My Photo Stream > Select. 

3. Tap the photos that you want to save, then tap the Share button  > Save Image.

On a Mac, your My Photo Stream photos automatically import to your library. 

Set up iCloud Photos

You can turn on iCloud Photos on any iPhone with iOS 8.3 or later, iPad with iPadOS 8.3 or later, or Mac with OS X Yosemite or later. After that, you can view your photos and videos in the Photos app on your iPhone, iPad, Mac, Apple TV, iCloud.com, and even sync them to a Windows PC using iCloud for Windows. 

Learn how to set up iCloud Photos on all of your devices

We hope that helps!

Apple has already ended it on July 26th. It is unlikely that you still have the My Photo Stream album and if you do I would act fast.