The save in the post your quoted likely only works for the gallery and nothing else. Well, it might also work in terms of allowing you to trigger NG+ with all the bonuses.
If you want access to the actual saves during gameplay and stuff, you likely need the full save folder with everything in it... and that's too big for this forum's attachments. Or at least, it is for my account. Dunno if there are differences.
If you want saves with formations and other stuff in them, then you need to use the save folder that's in the download link in
this post.