You will need to upload the parent folder with subfolders of each of the traits in your collection. Here's an example of the file structure:

📁 Parent folder

------ 📁 Attribute name

------------------PNGs/SVGs of each trait layer of this attribute

------📁Attribute name

------------------PNGs/SVGs of each trait layer of this attribute

For more detailed instructions, please refer to our tutorials for prepping files for Bueno using Photoshop and Figma.