How do I access to root files on Windows

Hello everyone.My system restarting itself over and over and I know why.I have to gain access to root directory files to edit a file.My device is on TWRP right now and my pc recognizes it.I have access to sdcard and external sdcard right now.I want to know how do I access root files through windows.I tried "Android Commander" but it didn't recognize my phone.I see some articles about ADB but I don't have enough info to use that.Is there a guide or something to use that for it? Do you know another way? Please help me.

Device: I9505
Windows 10