Earlier this week, Google announced a new update to Gmail and how attached files in an email can be downloaded. With the new update, you will have the option of downloading attachments directly to your Google Drive. This will eliminate the process of having to download the file to your computer or flash drive and then uploading the file to Google Drive. You will still have the option of saving the file to your computer or flash drive as well as Google Drive.
This update will be available within the next few weeks.
For more information, please see the official Google Blog post by clicking HERE