How to attach files during user registration process in Laravel 8

I'm developing a registration web app using Laravel 8, I'm quite new in Laravel. I would like users to attach files during registration (I will have 3 file upload fields in my form). Please help me come up with logic code for validating and uploading the files both in a directory and in mySQL database. I have checked for solutions online but none of them has worked. Please help me, Thanks.