SAK may work fine for older, smaller NSZ files but can struggle with newer, larger Nintendo Switch titles. The algorithm used in older versions of SAK might not support the updated compression methods found in recent game updates. 3. Insufficient Storage Space
Re-dump your keys from your Switch using Lockpick_RCM and replace the prod.keys file in your SAK configuration folder. Summary Checklist Potential Solution New Game/Update failing Update hactoolnet.exe "Read-only" error Uncheck Read-only in file properties "Decompression failed (-5)" Redownload file (likely corrupt) "Not enough space" Free up HDD/SSD space
If updating the keys doesn't help, the problem may be with the file itself.
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If you are manually unpacking a .sak or .zip file: Ensure you are using the latest version of 7-Zip or WinRAR .
This article provides a comprehensive overview of why "SAK decompression failed" occurs and the actionable steps you can take to resolve it. What is SAK and Why Does Decompression Fail?
For a visual walkthrough on updating keys and fixing attribute errors in SAK, watch this guide: SAK may work fine for older, smaller NSZ
Are you getting a specific (e.g., -12 or status 6)? Have you recently updated your prod.keys ? Decompression failed any NSZ · Issue #54 · dezem/SAK
Before doing anything else, confirm the file is not partially downloaded.
The "sak decompression failed" error is annoying, but it is rarely a sign of hardware failure. It is almost always a symptom of a "dirty" cache. In 90% of cases, simply via the Settings menu resolves the issue immediately. Insufficient Storage Space Re-dump your keys from your
A more robust command-line based tool that handles batch processing. DBI Installer: Instead of decompressing on a PC, you can install files directly to your Switch using
SAK Decompression Failed: Causes, Solutions, and Troubleshooting Tips for Switch Files
This repository was archived by the owner on Jul 17, 2023. It is now read-only. Decompression failed any NSZ #54. Copy link. Open. dezem/SAK: Switch Army Knife (SAK) - GitHub
The NSZ file was not downloaded or copied properly 1.2.3 .
This is critical for the Switch modding scene. A SAK file created with SAK Builder v1.5 may not be compatible with SAK Extractor v1.2 . Developers frequently update the archive structure. Trying to decompress a newer SAK with an older tool will result in a "failed" error because the version flag in the header is unknown.