How to manage permisstion on folder and files.

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database

MVC5

i am crating project where folder and files have permisstion and this folder and files have permisstion based on user and groups.

supposer i give root folder permisstion (read,write,delete) for group1
and subfolder or file give diffrent permisstion then how can i manage in database ...?

What I have tried:

DATABASE :

tbl_USER : id,name,project(rootfolder assign),
tbl_permisstion : id,uid,gid,read,write,delete,noaccess
tbl_group : id,groupname