S5 using crazy data

[KahneFan]

My Wife's Verizon S5 is using a large amount of data compared to my Note 4 - specifically it appears her FB app is using a ton of data (again, compared to my N4). She had her videos set to auto-play all the time, so I changed that to auto-play on WiFi only, but it appears she's still using a ton of data. I would venture to say I should be using much more data than her on any given month, yet she's almost double my usage. Any help is greatly appreciated.

Me (Note 4): 2.8G
Her (S5): 5.4G

 

[Tech-Newb]

A screenshot at her data usage can be very helpful.

Posted with ❤Love❤