Sorry to hear of your loss, please accept my condolences.
Just to be clear about how Fusion stores designs:
- Fusion 360 is an application that operates locally on your computer.
- When you open a design, Fusion downloads* it from your cloud storage (* if it is not already held in a temporary local cache that the application uses when you have recently opened a design - in that case it opens directly from this hidden local storage cache to save time).
- When you save a design, Fusion sends the data to be stored in the cloud.
Because of this, you cannot "lose" a file on your local machine. Right now you could erase your computer and your saved designs would be there after you installed Fusion again, and logged in again. And then the process listed above starts over as you open designs to work on them.
- The image below shows your local Fusion 360 application "data panel project list".
- It has Projects (containers for files and folders).
- If you double click on a project in your list, you can see the designs in it. From here you can open your designs.
This is what my projects list looks like when I browse it in Fusion 360 on my local machine
This image shows what the contents of one of my projects look like. (while browsing to it from within the Fusion 360 application on my local machine.) This is also the "data panel" view, but it's what you see inside a Project.
In Fusion 360 application view of read only designs inside a project
To answer your questions:
I have done a full search on my desktop, but there I can't find the file. So not sure how it is saved locally.
Answer: Fusion does not store designs on your desktop, or on your local machine in a way that can be searched using Windows Search Tools.
Instead: Open Fusion 360 and browse to projects/folders/designs using the "data panel".
Can it be that they are "auto deleted"???
Answer: That is impossible. The Delete command is distinct from other commands and cannot run unless you select something, right click, and pick Delete from the menu as you see in the image below.
I will go on a recovery tour and then follow up on my experiment to see if I can replicate what is happening.
If you can repeat what you think you saw, it would help greatly to record it for me. I'm very interested in anything you find. If you are marking designs as read-only and these are being deleted, that's a critical issue I need to follow up on. A video recording would help. I'm testing this entire workflow as I write this response and cannot reproduce any un-warranted deletion of designs.
Thanks for responding, and helping me understand what you are experiencing. As always, glad to help.
Phil Eichmiller
Software Engineer
Quality Assurance
Autodesk, Inc.