File category: paper bags, portfolios, information kits, white file.
File: used for their personal belongings or identity file maintenance.
Paper bag material: PP material, PVC material, kraft paper.
Bag style: button, file covers, sheet bags, transparent side wide transparent document bag (A4, F/C).
Kraft paper bag thickness: 150G, 250G, 350G, (3K, 4K, A4, F/C).
In addition, sometimes the "folder" and "paper bag" mean the same