Newb to Antennas. Understanding boosters 2.4ghz

[multiplexor 0]

Hey guys, I'll keep it super quick :-) I bought a wireless/wire-free security camera system recently and noticed the wireless camera will have a difficult time going through some concrete. I'm on the 3rd floor of this apartment unit, facing the underground parking and facing my parking spot. (the underground parking serves as the floor to the green grass backyard) However It's not going through. I was wondering if I opened the receiver and upgraded the antenna, if this would help? It uses: https://www.mediatek.com/products/homeNetworking/mt7628k-n-a and the antennas built in is super super basic. 

Am I able to simply disconnect them and connect a 2t2r signal booster such as: https://sunhans.en.made-in-china.com/product/DslnLFmxgOka/China-Sunhans-2T2R-1W-5-8GHz-MIMO-Wireless-Extender-Amplifier-WiFi-Repeater-Signal-Booster-Support-IEEE-802-11A-N.html (with the proper connecter to connect to the board obviously...) I figure the signal booster would atleast do more to help it get through the concrete.

wire-free security system: https://www.lorextechnology.com/hd-security-surveillance-camera-system/1080p-hd-wire-free-security-camera-system/L222A8E-2CM-E-1-p#downloadsTab

However I have a super super super super basic understanding of antennas. If you guys have any suggestions, I'm listening :-) 

[clanon 246]

best BOOSTER is a better antenna...(might require surgery...minor) if the stock is not detachable...

[clanon 246]

each  floor (cement...?) would steal at least 3db...if you are right on the BLIND SPOT (on top of the antenna) you'll get almost zero...giving the antenna some angle and using a reflector (small flat aluminum , foil could do)concentrating the energy on your receiver from the built in antenna (it seems to be a 2 dbi or less)