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).
7z a -v1g BTB.7z "C:\BigFolder" Use code with caution. Copied to clipboard BTB.7z
LZMA2 (optimal for multi-core processors) or LZMA. If you need to compress massive files or
To make the archive secure, you must use . Password: Use a strong, complex passphrase. Check "Encrypt file names" (crucial)
Check "Encrypt file names" (crucial). This prevents unauthorized users from even seeing what files are inside the archive without the password. 3. Creating Complex Archives (Command Line)
7z a -t7z -m0=lzma -mx=9 -mfb=64 -md=32m -ms=on -p -mhe=on BTB.7z "C:\Your\Files" Use code with caution. Copied to clipboard -mx=9 : Level 9 (Ultra) compression. -ms=on : Enable solid compression. -p : Prompts for a password (hidden typing). -mhe=on : Encrypts header (filenames).
-v1g : Splits the output into 1GB chunks ( BTB.7z.001 , BTB.7z.002 , etc.). Summary of Advanced Switches : Recursively include subfolders.