What is the paper thickness of the inner sheets of a paper file in grams?

We print all file content on standard A4 paper (white or sometimes green). The standard is 80 g per m². Only very occasionally do we include other types of paper from different sources. On rare occasions, the files include photos that have been submitted as models. Each file also includes one A4 label sheet with the unused labels in the front left pocket. Older files might also include one or two additional cardboard folders. We do not know the cardboard weight of the cover and the additional folders.