Adds files to archive.
7z a -tzip archive.zip subdir\*
adds all files from directory subdir to archive archive.zip.
7z a -tzip Files.zip "Program files\*" -r
adds all files from directory Program to archive Files.zip.
-i (Include), -m (Method), -p (Set Password), -r (Recurse), -t (Type of archive), -u (Update), -w (Working Dir), -x (Exclude),
Commands:
d (Delete),
u (Update)
Switches:
-u (Update)