Rolling Laptop Briefcase w/ Accordion Files - Travis & Wells
Amazon.com : Oxford Document Bag with Handle, A4 Paper Size Oxford Document Wallet Briefcase Accordion Folder Storage Bag, Suitable for School Home Business 12X15 inches (Pink) : Office Products
Leather accordion briefcase Stock 3D asset | Adobe Stock
Amazon.com : Oak-Pine Expandable Portable Accordion File Folder Document Wallet Briefcase PU Leather Business File Organizer Bag A4 and Letter Size 13 Pockets (Black) : Office Products
Briefcase with Accordion-Style Gusset : r/Leathercraft