Extracting compressed .zip or .7z archives with 7-Zip
Is password protection (encryption) necessary?
If you need to compress massive files or want the smallest possible size, use these settings in the dialog: Archive Format: 7z. Compression Level: Ultra (highest possible compression). BTB.7z
LZMA2 (optimal for multi-core processors) or LZMA.
Set high (e.g., 64MB or 128MB) for large files—requires more RAM. Extracting compressed
Set to "Solid" or a high number to treat files as one continuous stream, significantly improving compression for many small files. 2. The "Deep" Approach: Security & Encryption
: Use fully qualified file paths (useful for maintaining full structure). -x : Exclude specific files or folders (e.g., -x!*.log ). LZMA2 (optimal for multi-core processors) or LZMA
-v1g : Splits the output into 1GB chunks ( BTB.7z.001 , BTB.7z.002 , etc.). Summary of Advanced Switches : Recursively include subfolders.