So i have comcast internet and we get monthly 250 gb of data.a month my family uses about 110 gb of data. That includes xbox live for about 3 hours a day, 4 iphones for fb and email. 2 laptops for light surfing. The reason why i know someone is using my network because on the 7th of this month my data usage was up to 34 gb already since. I changed Wi-Fi password, my said is hidden and i'm using wpa2.since then i've told my family to tone it down on the internet usage, i have not even turned on my xbox or hardly used my laptop. I checked my data meter today around 6pm and it was at 36gb, check it again just now its 38gb. How is this posible when the most it was used for was my sister using a text free app no way that can use a whole gb of data. So how can i find out who's stealing my Wi-Fi? Does my router use data just by being connected to the modem?
Added (1). Well usually the data meter is spot on same as when i call comcast and ask them for my data usage as of date. My router does have a great range i mean i can walk up past 2 houses and ill still have one bar still.i've noticed one of those houses close to me have no Wi-Fi either the one next to me or the one across the street. Any programs that can help me find out, i've checked my router to the devices attached to me and those are all mine.