: You must have all related parts in the same folder (e.g., .001 , .002 , .003 , etc.).
Based on the filename pattern, this "piece" refers to a . The .002 extension indicates that this is the second part of a multi-volume compressed file (likely a 7-Zip archive). LL_KNIGA-SKUCH265.7z.002
The prefix LL_KNIGA suggests this is likely a or document collection (from the Russian "kniga" meaning "book"). The SKUCH suffix often appears in digital library cataloging or specific archive naming conventions. : You must have all related parts in the same folder (e