supporting material; attached documents; appendices
Refers to supplementary documents or materials attached to a main document, report, or application. 附属資料 is a more formal variant.
Graphs are attached to the report as supporting material.
Please submit the attached documents together with the application form.
添付資料 emphasizes physically or digitally attached files, while 付属資料 is broader, including any supplementary material that accompanies a main document.
Standard kanji spelling.
More formal variant using 附属.
Compound of 付属 (attachment, belonging) and 資料 (materials, documents).