Connect iPad to your PC and your iPad content will be displayed. Open a library/playlist, and check the files you want to export.
Copy iPad to PC
Click "Export Checked Files to Local Folder" drop-down button, then choose "Export to Local" option, then select the folder for saving the checked files in the dialog that opens to start exporting. Now you can copy iPad videos/music to your PC for backup.
Tip: You can also right click the checked files, and choose "Export to Local" option to start exporting the files to the folder you want.