i need help about backup. plz

hi there

i have been searching for an app that backs up a game/app and its progress & data/obb file

for NO ROOT android

i found one called helium (earlier called carbon)

the problem is

to start, you need a PC

well, i dont have one

i have my smartphone. my sdcard. my external hdd

thats all i have, and all i need

so anyone, please help me

is there any alternative that backs up everything (apk, progress, data, obb) without root ?

or is there any way to pass the pc thing in helium ?