.CSD File Extension

File Type:
Steam Game Data Backup File

Having trouble opening .csd extension? Don't panic! This page explains what csd files are as well as suggests programs you may use to open csd files. You can download these programs through this page.

What is a CSD file?

Csd file extension has Steam Game Data Backup file type, developed by Valve, which is associated with the "backup files" category.

Steam is a digital distribution platform that provides users with access to games and software. CSD files are backup files used by this service. They contain backup game information and are similar to .SID files. If the user accidentally deletes a game, he can restore it using a corresponding .CSD file. CSD files are always accompanied by .CSM files and can be found in the appropriate game folder in "Steam Backups" directory.


To learn how you can open the given file, read the information below.

csd file icon
File Type:
Steam Game Data Backup File
Backup Files

How to open CSD file?

Double click the csd file to open it. The file will open automatically if file associations have been correctly installed and there is a proper program on your computer; if not, file associations may be corrupted and your OS either cannot find the proper program, or you might not have one for opening the file. First, we recommend downloading our utility to fix file association errors; then, you can download any program for opening the .csd extension from the ones suggested below. If you are certain there is nothing wrong with the file associations, you may proceed to method 2 right away; besides, if you can't make up your mind when choosing the right program, use Universal File Viewer from the last method.

Method 1: Fix file association errors

Follow these steps in order to automatically fix the csd extension associations' problem in no time:

  • Step 1: Click on "Download Solution" to download automatic tool provided by WikiExt.
  • Step 2: Click "Start Scan" to identify all potential issues.
  • Step 3: Review scan results and click "Fix Items".

File Size: 3.04 MB, Download time: < 1 min. on DSL/ADSL/Cable

This Tool is Compatible With: Windows XP, Vista, 7, 8/8.1, 10

Method 2: Download the appropriate software

The given list provides programs which may be used for opening or converting the csd file. Choose the proper program for your OS, and click it to start the download or proceed to the developer's website.

Programs that open CSD files

Method 3: Use universal file viewer

In addition to the list of programs above, we recommend using Universal File Viewer. This tool can open over 250 file extensions and, most likely, it will be able to open the csd file as well. Download Universal File Viewer for your OS.

Download for Win
Secure download
Download for Mac
Secure download