While you're working with a file in a program, you should save it frequently to avoid losing data unexpectedly due to a power failure or other problems.
In the program that you're using, click the File menu, and then click Save.
If the file is new and this is the first time that you're saving it, type a name for the file in the File name box, and then click Save.
If you open an existing file and make changes, but you don't want to overwrite the original version, you can save a new version of the file.
By default, most programs save a file in a logical location for files of its type (for example, picture files are usually saved in the My Pictures folder). However, you can save the file in a different location. Here's how to save a new version of an existing file:
In the program that you're using, click the File menu, and then click Save as.
If the navigation pane (the left pane) isn't visible, in the lower left corner of the Save As dialog box, click Browse Folders to display it.
Do one of the following:
In the navigation pane, click the folder where you want to save the file.
In the address bar, click an arrow next to a folder name, and then click the folder.
In the address bar, type the full path to the folder (for example, C:\Users\Public). For more information, see Navigate using the address bar.
In the File name box, type a name for the file, and then click Save.
Files can't be opened or saved in Windows itself—you must use a program to perform these tasks. Typically, you would open or save a file in the program that was used to create the file. For more information, see Open a file or folder.
If you save a file to a library (such as Documents), the folder is saved to that library's default save location (for example, My Documents).
Depending on the type of file you're saving, you might be able to add file properties like tags at the time that you save the file. For example, you can add tags and other properties to Microsoft Office documents, pictures (such as JPEG files), and music (such as MP3 files). Later, you can search for and organize those files using these properties. For more information, see Change the properties for a file.