What is a .CSD File And How To Open It – Valve

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Have you downloaded a file with .csd extension, but you are not sure what it is? It is possible that you know what the file does, but you are unsure on how to open it. Fear not, in this article we will show you how to easily open the .csd file in few simple steps on various systems.

What is a .CSD file?

The file extension .CSD is Steam Game Data Backup File. This file extension belongs to the developer Valve. The file is a backup file.

What to know

There is currently 1 software that can open the .csd file on 1 platform.

How to open a .CSD file?

Below you can find an easy to understand, step-by-step guide to open the .CSD file on your operating system/device.

How to open a .CSD file on Windows (7, 8, 10)

There are 4 simple steps to open the .csd file on Windows.

1. In the first step you need to download the Valve Steam software. This software will be used for opening the file. The other software that you can use is Valve Steam.

Step 2

Step 2: Locating your .CSD file

2. In the second step you need to locate the downloaded file. If you don’t remember where you have downloaded your file to, you should check your /download/ folder as it usually gets automatically saved there.

Step 3

Step 3: Choose “Open with”

3. In the third step, after locating your file, right click on it and click “Open with”.

Step 4

Step 4: Choose the software and click ok

4. After choosing the “Open with” option, you will have an option to choose the Valve Steam software you have downloaded. Choose your software and click on “OK”. That’s all, now you have opened your file on Windows.

Still cannot open the .CSD file?

If you cannot open the .CSD file, it is entirely possible that you are trying to open the wrong file. There are many similar file extensions that look like the .CSD file.csd – Dream To Reality, .csd – CELSYS. You might be trying to open one of them. Please recheck the file extension again.


In this article you have learned how to open the .CSD file with the Valve Steam program on Windows.