How to check the relevance of the uploaded file and the file on the server in Django Python?

Question

Django

The essence of the problem is that when a file is uploaded to the server, its modification, creation, and opening date and time change to the current ones. Let me explain with an example why I need a file modification date.
There is a pdf file on the local computer, through the form on the site (implemented on Django) I want to upload this file to the cloud on Yandex.Disk (Y.D), while the file metadata (name, size, modification date, etc.) write to the database. After a while, I get another version of this file and I need to compare the file modification date on J.D and the new file. If the old version is on Y.D, I move it to the archive, and uploading the new version to Y.D with the “current” flag.
After two weeks of searching, I begin to understand that, due to security reasons, reading files on the client is very limited and what I am trying to do "on the forehead" is most likely impossible. Maybe someone came across, I will be glad for any information.
The security of uploading files does not matter, because I will upload the files myself. Possible file types are pdf, doc, docx, xls, xlsx, dwg.
I am already leaning towards a workaround to make a utility that will generate a package of files with the necessary information about them on the local computer, upload this package to Ya.D, and from Ya.D upload data to the site and to the database.