Folders with transparent bags inside are usually called "file bags" or "file bags". This kind of bag is usually made of transparent plastic, which can be used to store documents, papers, certificates, photos and other items, making it easy to organize and carry.
The advantage of portfolio is that it can protect files from pollution, damage and loss, and at the same time, it can make files more orderly and easy to find and use. It is a very practical file sorting tool, which can help people manage and protect files better and improve work efficiency.