This script tells you how to change the save file's format from .rxdata to any one you like! You can choose absolutely anything!
For example: Save1.mygamesave This script also shows how to change the name of the save files from Save to anything you want!
You can even choose where your game saves the files too, it is best to use common files, but it is possible to save to the Data file in your game's folder.

You'll need to understand these:
"Save#{@file_index + 1}.rxdata"
"Save#{i+1}.rxdata"
We'll deal with the structure after I show you what to do in the script editor.

Find these lines:
Window_SaveFile line 22
Scene_Title line 49
Scene_File line 109
These lines are what we'll be changing. Window_SaveFile line 22 and Scene_File have: "Save#{@file_index + 1}.rxdata"
Scene_Title line 49 has "Save#{i+1}.rxdata"

Scene_Title line 49: Save#{i+1}.rxdata

Scene_File line 109 and Window_SaveFile line 22: Save#{@file_index + 1}.rxdata

The Purple sections hold the name of the file, change Save to File as an example, the Orange is the File format, change this to sav as an example you'll have to do these with Window_SaveFile, Scene_Title and Scene_File for it to work.

To change the save location, we'll be using C:\Program Files\Common Files\Enterbrain
First we'll do Scene_Title line 49, change that purple section to: "C:/Program Files/Common Files/Enterbrain/File#{i+1}.sav"
With Scene_File line 109 and Window_SaveFile line 22, we need: "C:/Program Files/Common Files/Enterbrain/File#{file_index + 1}.sav"
It doesn't take a genious to work out what needs editing to change the save directory, but just to help, it's this: C:/Program Files/Common Files/Enterbrain/ and it ends infront of the File with a /

Hope you understand this, as most people don't understand my instruction.

Oh yes, and: don't steal this
Credit to: No-one
Thanks to: No-one
Compatibility issues: Doesn't work with any true time and day scripts.