misojou Said:
"downgrade to 5GB plan form 50GB: I cannot downgrade my iCloud storage plan. I want to downgrade to 5GB plan form 50GB but the 'save' option is greyed and I cannot select it. I only have Used 324.1 MB of files on it so 5GB should be available downgrade."
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iCloud:
If this "save" option is greyed-out, then try using a different device.
Properly 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.