New to Android (PC user)

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http://androidforums.com – I have an Asus transformer but have never used Android before, only PC. When working on files, I do not understand where the "save as" button is, or where to give it a filename to save with. All it says when you click "save" is "saved". I then have to go and find my file and move it to where I want it and then rename it. Also, on applications, there is no "open" button. So how do I find an old file that I wish to work on. This all seems clumsy, or have I got the model wrong in my head. :( (General)