Although this Mondo bag is using squares, it's done differently than the schlep bag in your link.Here is the one I made mine like.
http://quiltnotes.com/learning-center/make-a-mondo-bag/
Originally Posted by
Jo Belmont
The pattern is free at
https://sentimentalstitches.net/2009...torial-part-1/
It is shown with great visuals in 6 parts at their site. They also have a link at the top of the part 1 page where a summarized version of the pattern is available as a downloadable pdf. This, for me, is a definite gotta-do.