Having a data library for yourself and for others it is very important.
Moreover if we forget where to store the file, we can access it.
Google Takeout is an application provided by google to do the download of all files that have and upload to the google server with one click. In this way did not bother to download the files one by one.

Want to try ?
1. Login to your Google
2. Sign in to Google Takeout
Site : Click
3. Click the Downloads tab
4. Wait until the file size
5. Click the Download

I think this site can help a person when he forgot to put some important files to him / her . Like having your own library .