The File Extensions Database

.CSD File Extension

  • Developer by: Valve
  • Category: Backup Files

What is an .CSD file?

.CSD is Steam Game Data Backup File

A CSD file is a backup file created by Steam, a gaming service that allows users to download and manage Valve games. It contains backup game data, similar to a .SID file, and can be used to restore a game that has been deleted.

To restore a game from a CSD backup, select Steam → Backup and Restore Games... and choose the file. The CSD and corresponding .CSM files are is located in the appropriate game folder in the "Steam Backups" folder.

Programs that open Steam Game Data Backup File
Valve Steam
File Type 2 Compact Shared Document
Developer by: Dream To Reality Category: Page Layout Files

Electronic document format used for storing converted image and text file in a standard format; saves documents in a compressed format up to 10 times smaller than the original; can be viewed on a PC and various mobile devices.

NOTE: Dream To Reality CSD Reader is discontinued and no longer available for download.

File Type 3 Manga Studio Scene File
Developer by: CELSYS Category: 3D Image Files

3D scene created with the 3D Sketch component of Manga Studio comic book design software; often includes a 3D model of a comic book character, building, or other scenery; can be texturized and imported into a comic book.

3D Sketch is only available with the Manga Studio EX version. Manga Studio became Clip Studio Paint in 2015. It is also known as ComicStudio in Japan.

Programs that open Manga Studio Scene File
CELSYS Clip Studio Paint Pro
CELSYS Clip Studio Paint Pro

How to solve problems with CSD files

  • Associate the CSD file extension with the correct application. On :
    Windows: Right click on any CSD file and then click "Open with" > "Choose another app". Now select another program and check the box "Always use this app to open *.CSD files". Mac: Right click (or Ctrl-click) the CSD file, then click "Open with" > "Other...". Then choose another program and check the "Always Open With" box. Linux: Right click on the file, and select "Open with" and choose another program. iPhone: Tap the file. If you do not see an app to open the file, then tap Share "Share" and choose an app. Alternatively, save the file. Then open the Files app Files app. There long-press on the file, then release your finger. You will see a black menu bar. Then tap "Share" and select an app. Android: Tap the Settings icon on your smartphone, then tap on the Apps section. There tap the Options icon in the top right-hand corner of the screen to change the default apps.
  • Update your software that should actually open .CSD is Steam Game Data Backup File. Because only the current version supports the latest CSD file format. Search, therefore, e.g. on the Valve manufacturer website after an available .CSD is Steam Game Data Backup File update.
  • To make sure that your CSD file is not corrupted or virus-infected, get the file again and scan it with antivirus software.