If you are a Vtiger CRM user who also uses Google apps like Gmail, Calendar, etc., you can now sync your documents between Vtiger CRM and Google Drive.
When you upload a file to Drive, you will also have a record of the upload in your CRM account. This way, you can access your documents from your CRM account, and you do not have to log in to different online storage apps.
To know more about Google Drive + Vtiger CRM, click here
To know more about Google Drive, click here