: The compressor can find repeating patterns across different files rather than just within a single file. 📉 Disadvantages of Solid Content

In a standard 7-Zip (7z) archive, files are compressed individually. In a archive like your "doc2.7z" , the files are concatenated together before the compression algorithm is applied. 📈 Advantages of Solid Content

: Set it to Solid or choose a large block size (e.g., 2 GB , 4 GB , or Non-solid to turn it off).

: It significantly improves the compression size, especially when the archive contains many small, similar files (like text documents, code, or logs).

: Set the "Solid Block size" to Non-solid . This is recommended if you plan to frequently update the archive or need quick access to individual files. 7z File Format - Library of Congress

: If a part of the solid block becomes corrupted, it can damage or prevent the extraction of all subsequent files in that block.

: To extract just one file from the middle or end of the archive, the system must decode all the data that comes before it in the block.