I am wondering if I were to purchase the 'Airport time capsule' would it work like dropbox where I can access it from multiple devices even under data

I recently purchased a Ipad Mini 16gb Iphone 6 plus 16GB and a Macbook pro 128gb, I am wondering if I purchased a airport time capsule and connected it to the internet would I be able to access my files if I were to save them onto it from college but access them from anywhere or have I to be near my airport time capsule. Basically I am wondering is it like dropbox where I could have 4 devices connected to it security protected from anyone else while uploading all my files onto it ??

AirPort Time Capsule (2013)

AirPort Time Capsule (2013)

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