Choose File Upload in Create → Start from scratch. Enter Name, then select the file using Browse, drag-and-drop, or Select from Library. Follow the allowed file-size limit shown in the current editor.

Continue through the editor and download the QR code. Open the generated public link and check that the intended file can be accessed.

Only upload files you intend the audience to receive. A file in your account is not automatically private merely because it was uploaded while you were signed in. Review any protection settings separately before sharing sensitive material. If upload fails, provide support with the file type, size, and exact error rather than the confidential file itself.