Try SysTools Gmail Backup tool to export Gmail emails, contacts, calendars and Google drive storage files into multiple file formats. This tool also takes the backup of Google Docs / Spreadsheets / Slides / Images. For more info, visit its official website: https://www.systoolsgroup.com/gmail-backup.html
The FileCloud server is self-hosted and gives me the ability to store and share files, sync across different devices and back-up all documents and photos so that I don't have to worry about security.
Gmvault - Backup the emails in your Gmail account.
ifttt - IFTTT puts the internet to work for you. Create simple connections between the products you use every day.
MailStore - MailStore Home - A 100% free single-private-user desktop solution
WebDrive - WebDrive File Access Client allows you to open and edit server-based files without the additional step of downloading the file.
Got Your Back - Got Your Back (GYB) is a command line tool that backs up and restores your Gmail account.
ExpanDrive - ExpanDrive is a fast network drive and browser for cloud storage.