Create, edit, and sync-with-PC txt file on Android

There are many apps that allow us to take notes on android. But just like this thread (https://android.stackexchange.com/questions/109956/is-it-possible-to-create-a-plain-text-file-in-android) , I want to create and edit plain txt file on android. But moreover, I also want to automatically sync with a txt file in my PC. Ideally, dropbox. So ideally, I edit txt file on my PC then the edit will sync to my Android phone, and vice versa. But if this ideal solution (dropbox solution) is not available, then I am fine with less ideal solution which will sync txt with PC.