I have important data in my iCloud account, How to take the backup ?

Sysinfo iCloud Email Backup tool is a very efficient tool to backup emails into a personal system of users. You can migrate the iCloud mailbox emails to more than 15 email clients. You can also choose from a number of file formats. Like PST, PDF, CSV, MBOX etc. The tool is capable of backing up the data into the local drive of your system. The tool supports the migration to many email clients like Gmail, Office 365, Thunderbird, etc. 

Steps to follow to complete the backup process:

• Launch Sysinfo iCloud Email Backup Tool.
• Choose Single or Batch Mode.
• For Batch Mode, import a CSV File with iCloud Email Addresses and Passwords.
• Preview emails in Single Mode or proceed directly in Batch Mode.
• Pick File Format or Email Client to Save or Migrate iCloud Emails.
• For Email Clients, enter login credentials for authentication.
• If choosing a File Format, define the path to save converted iCloud Emails.
• Apply tool features if necessary.
• Click Convert to complete.