Is the social security relationship change form a file?

It doesn't matter, the files here should refer to the files established by the enterprise for you, such as your assessment materials, labor contracts, awards and other materials, including the materials you converted between different units. Files only work when you retire. When you retire, you will be required to submit your documents to the Social Security Center for approval of payment orders and other purposes. The file you mentioned is actually a student file, which is useless for determining your working hours and payment years. The advantage of handing it over to the talent center is to enjoy the treatment of national cadres, and at the same time, files become the absorption place of your professional files. For example, after you worked in the first company, you produced some documents. You can take the initiative to hand over the new files to the original file storage place, that is, the talent center, and the talent center will give you a receipt to prove which files you have handed in. Then a few years later, you can send the new files, such as the information of the city model workers you obtained, to the talent center for preservation. Of course, unimportant files don't need to be sent by yourself, just need to be kept by the employer, that is, when you leave this unit, you can ask the employer for files when you terminate the labor relationship. There is no causal relationship between the social security you handed in and where the file is. The reason is that some people don't graduate from school and have no files, but as long as they work in enterprises, enterprises should pay insurance for them. Therefore, filing is a process behavior, but social security should be done as soon as it enters the unit.

Further reading: How to buy insurance, which is good, and teach you how to avoid these "pits" of insurance.