Briefcases or work bags can be difficult to find, you want quality, and for women in creative fields with flexibility, the old standard bag modeled on men's bags just aren't a good fit.
I found this gorgeous bag on sale at Endless -
and I think it's perfect as a briefcase stand-in. It's dimensions allow for standard size laptops and files, along with all the things we need for a day - and look at that color! In addition to the short straps visible in the photo, it has a shoulder strap.
I love it so much I was trying to come up with justifications for getting it myself, but I did just buy that Gustto bag last week so I can't really do it - but you can! It was almost $600, and now it's $285. I have another Rachel Nasvik bag and I LOVE it, it's amazing quality and it isn't an obvious brand so on your way to work everyone won't be able to immediately identify it and someone ALWAYS complements it.