Step 1 :- Open snapchat in your android device.
Step 2 :- Click on ghost icon which is at snapchat home screen home screen.
Step 3 :- As next click on Setting icon at the top right corner of your device screen.
Strep 4 :- Now You need to fine section named Additional service , under the Addtional service section just click on mange option.
Step 5 :- Now check the check box corresponding to the option travel mode. This will reduce the snapchat mobile data usage.
That's it !!!
See also:-