Hacking delete games from system storage manually

[dust213dust]

i have some strange case here...
so i have installed cfw atmosphere, but at that time of installing cfw, i still had legit games on ofw. now i have about 16gb of storage on system memory that I cant use (i assume its that legit games that I had on ofw).i dont remember how but I have deleted entries for that games and now i cant find a way to delete this game files without reseting console to factory settings.

any suggestions on how i can manually delete this gamefiles? some file manager that can access consoles system storage? where can this game files be stored?

 

[acho]

if you remember all the games you deleted, try reinstalling them and deleting them 1 by 1 on Horizon via + button and manage software

 

[dust213dust]

does anyone know what will happen if I boot "stock (SYSNAND)" and reset to factory settings? (right now in hekate boot menu I have 2 options-CFW(EMUMMC and stock (SYSNAND))