If "ANUJSIPICSOSzip" was an archive sent to you unexpectedly, be careful. Scammers often use to hide malware from email scanners. Only open it if you trust the source and were expecting the file.
For a deep dive into how this technology works, the best blog post is the official announcement: ANUJSIPICSOSzip
: Developers can use the Python sozipfile module or the GDAL C++ library to create and manage these files. Caution Note If "ANUJSIPICSOSzip" was an archive sent to you
: It provides efficient random access with only a ~10% overhead compared to uncompressed files. ANUJSIPICSOSzip