The Best Archiver

[RateU]

If what you mean by the redundancy is there are much the same files in the archive, yes, Yumi, there are much the same files in the archive.
For example, the files in folder 1 are the same as the files in folder 2, with some modified files.
And in those folders, there are some xls files. Most of the xls files are the same also, some of the xls files has been modified in the others folder. They are usual xls files. The average size is about 1.7 MB.
I just full backup those folders from my previous localhost.

I've tried using WinRAR to archive it, the result is about 122 MB archive file (again, 1.27 MB using 7-Zip).

For the 7-Zip and WinRAR, I just use the default setting (right click -> folder_name.7z/rar).