How can I stop emojis from Facebook Messenger downloading to my gallery?

[Angiedengliah]

I've checked my file manager and the .nomedia file already exists. Please try to help me stop all of the emojis from Fb Msgr from downloading to my phones gallery.

 

[ManiacJoe]

Which phone?
Which version of android?
Which carrier?

Which folder are the emojis being put into?