File Decompression Guide
Shionlib downloads will progressively use zstd compression. This guide explains what to use, what to check first, and recommended PC/mobile tools with official download links.
Why we use zstd compression
To better balance download speed, file size, and server cost, Shionlib resources will progressively use zstd (Zstandard) compression.
In most cases, zstd provides better compression than traditional formats while still keeping decompression fast.
Before extracting, check these points
- Use an extractor that supports
zstd, or you may see errors like “unknown format” or “corrupted file”. - We do not use
.zstas the download file extension. Even when a file has another common archive extension, make sure your extractor supports thezstdalgorithm. - Download extraction software from official sources whenever possible, and avoid unknown repackaged builds.
Recommended extraction tools
PC
The official version of 7-Zip cannot extract 7z files compressed with zstd and reports “unsupported compression method”. 7-Zip ZS and NanaZip are used in the same way as 7-Zip.
Mobile
Supported formats may vary by version. If your current app cannot open
zstd-compressed files, update to the latest version and try again.
FAQ
What if the file is reported as corrupted?
First verify the download completed fully, then re-download once. If it still fails, try the latest 7-Zip ZS, NanaZip or Bandizip build.
What if extraction fails on mobile?
Update the app to a recent version first. If it still fails, extract on PC and transfer the extracted files back to your phone.