Free Ringtones Koodo Keybo

does anyone know how to get ringtones on your phone?

k so i have a LG keybo
i use koodo
to use the internet on my phone it costs 10 cents per page and mom doesn’t want me to O_O
and to buy ringtones off my phone with the one free internet page i have it cost 4$
i have a 8GB sd card for my phone
and i was just wondering if anyone knows how to get ringtones onto the phone from the sd card when its in the computer.
there is not ringtones folder in the phone but i’m sure theres a way.
or even if someone knows how to open hidden files from the sd card thats usefull

i use a site called Ventones

you can make ringtones for free