In the United States, the movie and home video industries continue to search for what they deem to be acceptable ways to let consumers duplicate and watch DVD content on their computers. But the results of their efforts are often clumsy and painfully unusable -- and always laden with caveats, restrictions and DRM software intended to protect the rights of the copyright holders.
It is a leagal to backup your dvd for personal use in United states.But you need some kind of software to do the copying for you.There are a lot online which one you want to use depends on your own preferrence .It does not matter which software you use , COZ they usually work the same way . i used wondershare software to do the job. DVD Copy for Mac is quite easy to use and it takes only a few steps to copy the entire DVD.Here is a step by step guide on how to copy dvd
Step 1: Select DVD Source
You can not only select a DVD rom, but also a DVD folder which appears like "Video_ts". Wondershare DVD Copy for Mac is also a DVD burning software to some extent.
Step 2: Select DVD Copy Method
In the "Select DVD Copy Method" field to select a method to output the selected DVD movie:
If you want to output your DVD movie to a folder on your hard disc, you can select the "Output DVD Folder" option, and specify a directory to save the copied DVD movie.
If you want to directly burn your DVD movie to a new DVD disc, you can just select the DVD ROM where you have inserted a blank DVD disc.
Step 3: Program Settings (Optional)
Set Buffer Directory: Select a folder on a hard disc that has relatively big free space to store the temporary files.
Select Language: Select an interface language for the program.
Step 4: Start Copying DVD
Click the Start button to start copying your DVD movie and/or burning it to a new DVD disc.
If you are copying a DVD disc from your DVD ROM to a new DVD disc, you will be asked to insert a blank DVD disc. If so, you can just take the original DVD disc out and insert a blank DVD disc.
How to copy DVD on Windows
DVD COPY Software is very simple to use. To copy a DVD, click the "START" button.
You can configure your software by clicking on the "Options" button. There are hints (popup captions) available for some options, which you will see when you hover the mouse over the check box or title. You will also find several other options in the popup menu, which you can access by clicking the right mouse button anywhere on the application.
Note: You can open this user guide by clicking "?" (help) button or by clicking the F1 keyboard key.
The default settings will allow you to copy a "Movie Only" DVD (no extras for the best video quality) with English language audio. You can modify these default settings in the Options dialog.
OPTIONS: Default options (language and copy settings).
?: User Guide.
--: Minimize the application.
X: Close the application.
Popup Menu:
Click the right mouse on the main application window.
Shortcut Keys:
F1: Opens the User Guide
F2: Opens the Registration Window
F8: Opens the log file in notepad
source based on this site : http://www.dvdcopymac.org/
want more information ,just go ahead !
It is a leagal to backup your dvd for personal use in United states.But you need some kind of software to do the copying for you.There are a lot online which one you want to use depends on your own preferrence .It does not matter which software you use , COZ they usually work the same way . i used wondershare software to do the job. DVD Copy for Mac is quite easy to use and it takes only a few steps to copy the entire DVD.Here is a step by step guide on how to copy dvd
Step 1: Select DVD Source

You can not only select a DVD rom, but also a DVD folder which appears like "Video_ts". Wondershare DVD Copy for Mac is also a DVD burning software to some extent.
Step 2: Select DVD Copy Method
In the "Select DVD Copy Method" field to select a method to output the selected DVD movie:
If you want to output your DVD movie to a folder on your hard disc, you can select the "Output DVD Folder" option, and specify a directory to save the copied DVD movie.
If you want to directly burn your DVD movie to a new DVD disc, you can just select the DVD ROM where you have inserted a blank DVD disc.
Step 3: Program Settings (Optional)

Set Buffer Directory: Select a folder on a hard disc that has relatively big free space to store the temporary files.
Select Language: Select an interface language for the program.
Step 4: Start Copying DVD
Click the Start button to start copying your DVD movie and/or burning it to a new DVD disc.
If you are copying a DVD disc from your DVD ROM to a new DVD disc, you will be asked to insert a blank DVD disc. If so, you can just take the original DVD disc out and insert a blank DVD disc.
How to copy DVD on Windows
DVD COPY Software is very simple to use. To copy a DVD, click the "START" button.

You can configure your software by clicking on the "Options" button. There are hints (popup captions) available for some options, which you will see when you hover the mouse over the check box or title. You will also find several other options in the popup menu, which you can access by clicking the right mouse button anywhere on the application.
Note: You can open this user guide by clicking "?" (help) button or by clicking the F1 keyboard key.

The default settings will allow you to copy a "Movie Only" DVD (no extras for the best video quality) with English language audio. You can modify these default settings in the Options dialog.
OPTIONS: Default options (language and copy settings).
?: User Guide.
--: Minimize the application.
X: Close the application.
Popup Menu:
Click the right mouse on the main application window.
Shortcut Keys:
F1: Opens the User Guide
F2: Opens the Registration Window
F8: Opens the log file in notepad
source based on this site : http://www.dvdcopymac.org/
want more information ,just go ahead !