Put the card back in your 3DS and run the homebrew script to make the icons appear on your HOME menu. Prevention Tips
Copy (especially the Nintendo 3DS and luma directories) to a safe backup folder on your PC desktop.
The error most commonly means that the or the SD card is failing . This check failure occurs when the internal "hash" of the file doesn't match what the console expects, usually because the data was modified or damaged during transfer. Recommended Solutions
If you're using a cheap or failing SD card, the very act of writing a file to it can corrupt the data. An error may occur while saving or copying the .CIA file onto the card, leading to a corrupted file. failed to install cia file 0xd8e0806a work
Back up all files from your 3DS SD card to a secure folder on your computer.
If you have a slow or unstable internet connection, use a download manager to ensure the file isn't corrupted during download. 2. Check SD Card for Errors (chkdsk)
Run a full write-and-verify test on the completely empty SD card. Put the card back in your 3DS and
Before messing with your hardware, try downloading the file again from a reliable source like the hShop . Ensure your internet connection is stable; many users find that a fresh download fixes the hash check failure immediately. 2. Check and Repair Your SD Card
To update Boot9Strap, the safest method is to use the Luma3DS Updater homebrew application or to follow the "Restoring / Updating CFW" section on the official 3DS Hacks Guide.
If Step 2 doesn't work, a different installation method can sometimes bypass the issue. Instead of copying the file directly to your SD, you can use FBI to download and install it simultaneously from a direct link or a title database. This check failure occurs when the internal "hash"
This information can help pinpoint whether the issue lies with a single file or a larger system error. Share public link
If multiple files are failing, your SD card is the likely culprit.