1. Create a user account if needed.
2. Go to the folder's sharing option, mark it shared, and assign permissions.
3. On the remote computer, using the file explorer, type in
\\<computer_name>\<share>
substituting the "computer_name" and "share"" with the main PC's computer name and share name you created and when promted for username and password, use the account information you did in step 1.
@ pathik_shah
If you need more information, start a new thread.