I have Windows 7 on my system. On starting PC, it asks me to select Windows 7 or Ubuntu 12.04. In windows, I have 3 parts, Drive C,D,J. When I open Ubuntu, I have category named "Devices". In that, those parts(C,D,J) are there with different names. But a part named "79 GB system" seems to be C drive of Windows but it has some things which are not visible in Windows. So what is this?
Secondly, there is category in Ubuntu named "File system". In that I have all sections like boot, etc, dev, root, run... so, now what is this? What is the relation between that devices and this file system? Where is this file system stored?
When I am storing my C, C++ files in home/username--> then where is it getting stored? in which drive? like C,D or J of windows? I am getting confused with all this. Thanks in advance.