Warning! Mirror 2 can take considerable amount of time to catch up with mirror 1 as I need to pack the changes into new archive and then uploading them takes the time also. If they are in progress of being updated, you will see that the links are empty.
Packed versions have been compressed using 7-zip with ultra settings in .7z container, so it’s highly likely you need 7-zip to open those archives (never versions of Winrar and Winzip may be able to open those files, but I’m not sure). That means that the unpacked version (at the time of writing 15,2GB) has been compressed into packed version (at the time of writing 4.5GB), which is a lot smaller, which allows for faster download. Yes, it will take a lot longer to unpack, but you’ll win the time with the download time (for most people)