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Hello,
Data are not persisted in an appstream environment except for D:/PhotonUser as explained here : Storage consideration.
answered 2 years ago
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Scenario/ Issue:
When the streaming URL of an AppStream 2.0 stack expires, a new streaming URL must be generated to continue working. To access the existing data, the same User ID must be used when regenerating the streaming URL. If a different User ID is used (by mistake), a new instance will be created without any existing data in it.
This troubleshooting guide presents a way to retrieve the original instance, which contains all your existing data.
Troubleshooting Steps:
- Terminate any running session of the AppStream stack.
- Go to S3 and navigate to a path similar to: s3://appstream-app-settings-... /Windows/version/Server-2019/BluAge-L3-Workshop-Stack/custom/ (e.g., s3://appstream-app-settings-eu-central-1-820242900304-4la3rs9b/Windows/v6/Server-2019/BluAge-L3-Workshop-Stack/custom/ ).
- There you will see more than one key, each one corresponding to each stack instance you might have created. You need to carefully delete all the keys EXCEPT the ONLY ONE which is having the largest sized Profile.vhdx file in it.
- Now, go back to your AppStream 2.0 stack and create a streaming URL with the exact same User ID as your original streaming URL, and launch it. You should get back all your data.
answered 2 years ago
I have done the process as mentioned but still can't see my old changes

Hi, Appstream cannot persist data between sessions if these are not in the locations indicated here: For single-session, non-domain-joined Windows instances: C:\Users\PhotonUser\My Files\Home Folder. Some other options can be found here: https://docs.aws.amazon.com/appstream2/latest/developerguide/home-folders.html
Thanks camlon for your suggestion !
FYI, I found a solution to restore the data when streaming URL expired. PFB
My data was restored in new streaming URL.