Where are Messages and other data like Application caches or even Applications saved? Where are the Datas like Messages or Applications exists, i have looked at many stackexchange's Android questions and found that its in data/ location, but when i tried searching for data/ but find data/ in android/ folder i.e Android/data/**, i did'nt find anything in it like .APKs, and even i tried formatting both internal and external(SD Card) storage, but after opening "Messaging App" it shows every messages, even tried restarting my phone because i thought the messages should be loaded up already in the memory, and the applications still exists in my phone after formatting internal memory and removing external memory card, are they installed on a other disk where the OS is installed, because even 3rd party apps can be seen in the Apps list like Hike and WhatsApp, where are the 3rd party Apps installed other than SD card and Internal memory, i have'nt done anything like rooting, i have Micromax Canvas 2+ A110q (Jelly Bean OS), Can anyone tell where does my device installs those third party Apps.



In short: I have formated my Internal SD Card on my PC through USB cable, and removed the External SD card, and restarted the device, but still Messages and Apps can be seen even 3rd party Apps messages(i.e hike's and WhatsApp's Messages).
Thanks in advance!!
Messages are stored in /data/data/(apps package name) folder which you cant access since your device is not rooted.
There are built in options in these app to delete conversations
( e.g in whatsapp go to settings>chat setting>delete all conversation)
You can also delete this data by going to settings>apps>App  which you want to delete data e.g:Whatsapp>clear data
(NOTE: If you will clear data you have to log in agian in app(whatsapp/hike) and dont select restore conversation in whatsapp)