FIX: Steam Deck Format SD Card Error, Stuck on Testing Error

Steam Deck is a digital platform that allows users to purchase, download, and play various video games. Steam Deck has an extensive library of games from various genres, including action, adventure, strategy, and sports. It also offers social networking, in-game voice chat, and user reviews and ratings. Steam Deck is a popular choice among gamers due to its wide selection of games and convenient features.

Unfortunately, The Steam Deck Format SD Card Error is a problem that occurs when users attempt to format their SD card using the Steam Deck application. This error often occurs when the SD card is corrupted or damaged, and it can prevent users from accessing the data on the card. If the Steam Deck application is stuck on the “Testing” error, it cannot complete the formatting due to an SD card problem. In this article, we will explore the causes of this error and provide some potential solutions for fixing it.

How to Install Non-Steam Games on Steam Deck

Why Steam Deck Format SD Card Showing Error and Stuck on Testing Error?

There are a few possible causes for an SD card error on a steam deck or getting stuck on a “testing” error message. Some possible causes include the following:

  • The SD card is damaged or has become corrupted. These can happen if the card is physically damaged or has been subjected to extreme temperature or humidity.
  • The SD card is not properly formatted. Steam decks typically require that the may format SD cards in a specific way, and if the card is not formatted correctly, it may not be recognized by the device.
  • The SD card is not compatible with the steam deck. Some steam decks are only compatible with certain types of SD cards, and using an incompatible card may cause errors or other problems.
  • There is a problem with the steam deck itself. The steam deck may sometimes have a hardware or software issue, causing the error message to appear.

Fix Steam Deck Format SD Card Error and Stuck on Testing Error

Various reasons cause Steam Deck format SD Card errors, and you can easily fix this issue by following a few solutions. Most users reported this issue on several platforms, and there are some fixes you can try to solve them. However, several fixes exist to resolve these types of issues. So, if you are facing the Steam Deck format SD Card error issue, then read this guide at last to fix the issue.

Restart the Steam Deck

If you are facing a Steam Deck format SD Card error or are stuck on a testing error, then you can try to solve them by restarting the Steam Deck. Restarting the device sometimes helps you resolve any temporary issues and bugs without installing any third-party applications. To restart your Steam Deck, follow these steps:

  1. Press and hold the power button for about 10-15 seconds on your Steam Deck.
  2. Now release the power button and press it again to power on the Steam Deck.

Check Your SD Card

If you are experiencing the Steam Deck Format SD Card Error or the “Stuck on Testing” error, one potential solution is to check the SD card you are using. This error can sometimes occur due to a problem with the SD card itself, such as if it is damaged or corrupted.

To check the SD card, you will need to remove it from the Steam Deck and connect it to a computer using a card reader. From there, you can run a diagnostic on the card to see if there are any issues. If the diagnostic finds a problem, you may need to replace the SD card in order to fix the error.

Check SD Card for Any Physical Damage

Another reason for causing the error is the SD Card may be damaged. To check for physical damage on an SD card, you will need to remove it from any currently inserted device. Once removed, visually inspect the card for any cracks, scratches, or other visible damage. If you do not see any physical damage on the card, it is possible that the issue may be with the device the card is being used in or with the card’s filesystem.

If you see physical damage, the card may need to be replaced as it may be causing errors. To fix the “Steam Deck SD Card Error,” you may need to try using the card on a different device to see if it is the device causing the issue or if the issue is with the card itself. If the card continues to cause errors in different devices, it may need to be replaced.

Try Another SD Card

If the issue persists, you can try to use another SD Card in the Steam Deck. It is possible that the SD card you are currently using may be faulty or not compatible with the Steam Deck. Using a different SD card, you may be able to format it successfully and resolve the error. Make sure to use an SD card that is compatible with the Steam Deck and has enough storage capacity for your needs. If the problem persists even after trying a different SD card, it is worth considering seeking further assistance or consulting the Steam Deck documentation for additional troubleshooting steps.

Contact the Support Team

If you are still experiencing an error with your Steam Deck Format SD Card or are stuck on a Testing Error, it’s recommended that you contact the Steam Support team for assistance. They will be able to provide you with guidance on how to troubleshoot and resolve the issue.

To contact the Support team, you can visit the Steam support website and submit a ticket with a description of the issue you are experiencing. You may also be able to find helpful information by searching the Steam Knowledge Base or by posting in the Steam Community forums.

Frequently Asked Questions

What is the Steam Deck Format SD Card error?

The Steam Deck Format SD Card error is an issue that can occur when trying to format an SD card for use with a Steam Deck device. This error can cause the formatting process to become stuck, preventing the user from being able to access the SD card.

What causes the Steam Deck Format SD Card error?

The exact cause of the Steam Deck Format SD Card error is unclear, but it is believed to be related to a problem with the formatting process. In some cases, the error may be caused by a faulty SD card or a problem with the Steam Deck device.

How can I fix the Steam Deck Format SD Card error?

To fix the Steam Deck Format SD Card error, try the following steps:

  • Check that the SD card is compatible with the Steam Deck device.
  • Try formatting the SD card using a different device, such as a laptop or phone.
  • Check the SD card for any physical damage, such as bent or broken connectors.
  • Try using a different SD card to see if the error persists.
  • If the error persists, try resetting the Steam Deck device to its factory settings.

Can the Steam Deck Format SD Card error be prevented?

There is no guaranteed way to prevent the Steam Deck Format SD Card error from occurring. However, keeping the SD card and Steam Deck device in good working order and following best practices for formatting and using SD cards can help reduce the risk of encountering this error.


Based on the information provided, you appear to be experiencing an error with a Steam Deck device that involves a formatting error with an SD card and getting stuck on a “Testing” error message. However, we have mentioned some possible methods to fix the issue. If the above methods do not resolve the error, it may be necessary to seek further assistance from the manufacturer or a technical support service.


  1. I found the issue, why is steam deck not formatting the SD card,
    unmount the SD card then go and format it, easy!

    Good Luck,

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