Getting a "Disk Write Error" on Steam can be highly frustrating, especially when you're downloading a game and it stops after a few megabytes, refusing to resume.
The disk write error on Steam usually appears when the platform is unable to store game files on your storage drive. Corrupted files, permission issues, and software conflicts are all common factors. As frustrating as it is, the Steam write error can sometimes fix itself, but return with the next update. Here's an overview of what's causing it and the solutions that can help fix it:
Delete the steamapps\downloading Folder

This folder stores corrupted and incomplete downloads. Deleting it can force Steam to re-download fresh files. Just navigate to your Steam library folder and delete everything inside the downloading subfolder. Here's the location of the folder:
Run Steam as Administrator
This is the most straightforward fix that grants Steam the necessary permissions to write files. Right-click on the Steam shortcut and select "Run as Administrator."
Check File and Folder Permissions

Navigate to the Steam Library Folder, right-click on it, select Properties, and then go to Security. Ensure that your user account has complete control. Also, remove any "Read-only" flags from the folder.
Disable Antivirus/Firewall Temporarily
Security software can sometimes block the file-writing process. Turn off your antivirus and Windows Defender and see if downloads resume.
Clear Steam’s Download Cache

In the Steam app, navigate to Settings > Downloads > Clear Download Cache. This will force Steam to refresh and clear up any download errors.
Change Download Region

Sometimes, the nearby region is overloaded, and switching to a different one could help. To do so, open Settings > Downloads > Download Region.
Try a Different Install Drive or Folder

Another possibility is that your original drive may have some underlying issues. If that's the case, try creating a new Steam library folder on a different drive and see if installing the app there resolves the problem.
Reinstall Steam (Without Deleting Games)
Lastly, if none of the above fixes work, try reinstalling Steam as it can flush out corrupted configuration files. Make sure to back up your Steamapps folder so you don't have to re-download everything.
Still No Luck?
Some users say that the Steam disk error only affects specific games and suggest that a complete Windows reinstall or filing a Steam bug report may be the last resort. While it's painful and frustrating, there's a possibility it's the only way to eliminate system-level conflicts.
Did these fixes help solve your Steam disk write error? Drop a comment below and let us know which one worked—or if you found another fix!