whzg Said:
"Downgrading iCloud+: What will happen if I downgrade my iCloud plan to free version? Since at the moment most of my account is using iCloud email 'hider'. Do I need to manually change all my email from apple's iCloud email to main email? or it all will stay but I cannot add new 'anon iCloud' email?"
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iCloud eMail and Storage:
A. Transferring Mail:
As for transferring Mail, use this link on how to, export them, then import them. Go Here: Import or Export Mailboxes in Mail on Mac - Apple Support
B. Successfully Downgrading iCloud:
1. Download All of iCloud, First:
Prior to downgrading, download all of iCloud. That way you do not lose any data, once downgrading.. Use my user tip: Getting a Quick and Direct "iCloud Drive-to-External Hard Drive" Download - User Tip
then...
2. Downgrade your iCloud Plan:
If you want to get less storage in iCloud, downgrading your iCloud plan is the way to go. Note that this has a monthly fee. Here is the link to user: iCloud+ Plans and Pricing - Apple Support. Note that this service is not available in all countries/regions.