When Microsoft Office documents are uploaded to Google Drive, they aren’t automatically converted to Google Drive formats. If you plan to edit the file in a Google application, it will need to be converted to the Google format. If this is something you’ll need to do with all of your files, you can adjust your settings to have files automatically convert to Google Drive formats upon upload.
Google Drive settings can only be updated on your computer.
Click the Settings button.
Click the Convert uploaded files to Google Docs editor format check box.
Depending on the file, it may not look exactly the same as the original. It’s a good idea to check converted files for errors before sharing them with others.
If you want a separate copy of a file to save locally on your computer, just download it.
Select the file or folder you want to download.
Click the More actions button.
You can also right-click a file or folder and select Download from the menu.
A copy of the file is downloaded to your computer. Google files are converted to corresponding Office file types, e.g. Google Docs files are converted to Microsoft Word files. If multiple files were selected, they’re downloaded in a zip folder.