Google drive how to secure access levels when working with folders and documents?

Question

Access rights

Good afternoon!
The company uses shared folders on Google Drive to work and store information on clients, deals and other important information. The main folder was created by me, inside there are many folders that are partly created by me, partly by colleagues, in which files and documents are stored that are created and with which work is being done.
Now the question arose of how to properly protect yourself, if one of the employees leaves the company, then he will have access to the files and folders that he created and can somehow “take away” or take advantage of this moment.
Based on this, there are several questions:

1. How to set the owner of all folders to myself (I read and know how to transfer the rights to the folder, but files that are inside the folder (except for Google formats) are not supported there, so that at any time you can turn off any employee (when dismissed, for example) with minimal impact it on folders and documents?
   
2. Maybe you need to create a separate gmail account for each employee so that he works only in it (it’s difficult to transfer everything)? It would be ideal to disable it from all folders with one click
   
3. Is it possible to somehow provide access to files, for example, from only one computer, if the employee does not need to have access to files remotely?
   
4. Each computer has its own originals, which, accordingly, when access to the folder is deleted, they will still remain with the employee on the computer. If we can still protect access to the computer, then because. an employee uses his gmail account, then this data can easily be accessed on a home computer (How to deal with this?
   I’ll say right away that I don’t want to build some kind of internal servers.
   

Answer 1

Google drive how to secure

In principle, you don’t have to read further ...
My favorite quote from Leonid Reznik's book "Magic Triangle":
"... The answer of the Supersystem instantly destroyed bright hopes: "The problem has no solution"..."
To "secure" or even at least to do something, you have to control the object. And they let you do exactly what they give you. And nothing but. That's the price of convenience.
And if they don't like the contents of your documents, they'll just be deleted
. By the way, I've never been able to get through to Google support.

Answer 2

take away or use

You can't be saved from this. Anyone with access, even if they are not the owner, can simply copy the document (before being fired). There is even a special button "Make a copy for yourself", that is, it is done almost in one click.
And so there is documentation that is easy to google.