Google Docs has a version history for uploaded files.

Earlier this year, Google Docs introduced the ability to download, store and open access to files up to gigabytes. But every time you had to update the file, you had to download the new version as a new file with a new address, reopen it and put it in the necessary folders.

Now you can download new versions of the same file.

When you select “Add versions or manage them”, you can download new versions of a file, download previous versions and delete old ones.
')