Go to Settings --> Apple ID --> Media & Purchases and Sign Out. Go back to Settings --> Apple ID --> iCloud and then upgrade the storage. Once completed Sign In again to Media & Purchases. Maybe is a bug or glitch from iOS 15.2.1 but this option worked for me. Answer from Deleted User on reddit.com
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Reddit
reddit.com › r/techsupport › why can't i upgrade my icloud to icloud+?
r/techsupport on Reddit: Why can't I upgrade my iCloud to iCloud+?
October 10, 2021 -

I go into Apple ID on my phone > iCloud > Manage storage > Change storage plan and then Upgrade to iCloud+ and it just constantly fails.

It says

"Your storage could not be upgraded.

iCloud storage could not be upgraded at this time. Try again later in Settings."

Been trying this since the release of iOS 15, about three weeks now. Anyone knows why this is? I know of people in my area/country that have this so it's not a location problem.

Cheers.

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Quora
quora.com › I-just-bought-more-iCloud-storage-but-it-still-says-it-s-full-how-do-I-fix-this
I just bought more iCloud storage but it still says it’s full, how do I fix this? - Quora
Answer (1 of 6): I had the same problem, and fixed it very easily. First of all, don’t let the other replies scare you! Usually, this is just the reason - and it’s very easy to fix it. Just follow my steps: 1. go to settings of your iPhone 2. scroll down, and press the red “Sign Out” button 3. ...
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Apple Community
discussions.apple.com › thread › 254535362
Something went wrong with my upgrading for more icloud ...
Upgraded iCloud storage to 50mb. Phone not recognizing the update and I can’t do any upgrades Upgraded iCloud to 50mb.
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MacRumors
macrumors.com › how-to › fix-icloud-storage-upgrade-not-working
Can't Upgrade Your iCloud+ Storage Plan on iPhone or iPad? Here's How to Fix It - MacRumors
If you’re an iPhone and iPad user, you can upgrade using your device by going to Settings, clicking on your name, and tapping through to ‌iCloud‌ -> Manage Storage or ‌iCloud‌ Storage. When you tap Buy More Storage or Change Storage Plan, you can choose a plan by following the onscreen instructions. This is usually a fairly straightforward process, but occasionally some users receive the message “Your storage could not be upgraded at this time.
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CBackup
cbackup.com › cbackup tutorials › 6 fixes: upgrade icloud storage not working on ios devices
6 Fixes: Upgrade iCloud Storage Not Working on iOS Devices
June 23, 2025 - At the same time, you will be reminded ... and if your iCloud upgrade storage doesn't work, you may need to make sure you've upgraded to the latest iOS first....
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MultCloud
multcloud.com › explore more about popular clouds › how to fix 'upgrade icloud storage not working' issues in 2025
How to Fix 'Upgrade iCloud Storage Not Working' Issues in 2025
September 1, 2025 - Several factors could cause the "upgrade iCloud storage not working" issue. These include outdated software, insufficient funds, or temporary glitches in Apple’s servers.
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uBackup
ubackup.com › aomei backup › phone backup › [2025] 4 fixes to upgrade icloud storage not working
[2025] 4 Fixes to Upgrade iCloud Storage not Working
January 3, 2025 - In conclusion, you can try to re-add your Apple account, reset the network settings, etc. to fix the “upgrade iCloud storage not working” issue. If you are considering backup iPhone without iCloud, try AOMEI FoneBackup to help you backup ...
Find elsewhere
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MultCloud
multcloud.com › multcloud tutorials › i bought more icloud storage but it's not working | 5 ways
I Bought More iCloud Storage But It's Not Working | 5 Ways
May 6, 2025 - That explains the why your iPhone still full after upgrading to get more iCloud storage. To free up space for iPhone: You can enable iCloud Photos to move photos and videos to iCloud Photos, and use optimize iPhone Storage to get more available space. Or go to the Settings > General > Storage & iCloud Usage to check what’s taking up the most space and try to delete unnecessary files to free up iPhone storage, like deleting iCloud Drive files, iCloud Photos, and other files.
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YouTube
youtube.com › watch
Can't Upgrade Your iCloud+ Storage Plan on iPhone or iPad? Here is the Fix! - YouTube
Unable to upgrade iCloud + storage plan on iPhone and iPad? Here is the quick way to fix this annoying issue!#ios17, #iphone, #iPad
Published   April 12, 2022
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YouTube
youtube.com › watch
How to fix Upgrade iCloud Storage Not Working on iPhone in iOS 15. - YouTube
How to fix Upgrade iCloud Storage Not Working on iPhone in iOS 15.
Published   February 15, 2022
Views   15K
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Apple Community
discussions.apple.com › thread › 250882438
It won’t let me upgrade my iCloud storage - Apple Community
I'd be happy to provide information to help you address this. Try restarting your iPhone first: Restart your iPhone · Complete any necessary updates: Update your iPhone, iPad, or iPod touch · If you have any other devices available to you, try upgrading from another device: Buy more iCloud storage
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Tenorshare
tenorshare.com › fix-iphone › icloud-drive-upgrading-stuck.html
Your Guide to Fix 'iCloud Drive Upgrading Stuck'
October 13, 2020 - Your iPhone might be running a faulty iOS version preventing you from upgrading iCloud drive. There might be insufficient available storage to perform the iCloud drive upgrade
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JustAnswer
justanswer.com › software › nm9rd-i-m-trying-upgrade-icloud-storage-plan-keep.html
How to Upgrade iCloud Storage: Expert Solutions & Troubleshooting
Customer: I'm trying to upgrade my icloud storage plan and I keep telling it to upgrade to 2TB and it tells me I'm already in a Music plan and it won't upgrade my plan and I'm not sure if you have my old credit card and want to update it Technician's Assistant: I understand that you're having ...
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YouTube
youtube.com › devicecare+
How to Fix iCloud Saying Your Storage Could Not Be Upgraded on iPhone | Can't Upgrade iCloud Storage - YouTube
Is iCloud saying your storage could not be upgraded on your iPhone? I have the fix for your iPhone upgrade iCloud storage not working problem! In this video,...
Published   December 3, 2024
Views   87
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MacRumors
forums.macrumors.com › iphone, ipad, and ipod touch › ios and ipados › older ios versions › ios 15
iCloud+ “Your storage could not be upgraded” | MacRumors Forums
September 21, 2021 - Upgrade iCloud+ (something like that) Not now I don't know why but "Not now" worked for me. its strange buy by pressing not now took me to a payment screen. ... Had the same issue, the recommendation to sign out from 'Media and Purchases' strangely worked for me. Once signed out go to upgrade the storage as normal and there was no issues.
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JustAnswer
justanswer.com › smartphones › rqqa8-need-increase-icloud-storage-putting.html
How to Fix iCloud Storage Upgrade Issues on iPhone 15
For some reason I can’t even purchase more storage. My iCloud is ... If you're still unable to find the credit card option directly through iCloud, try upgrading your storage via the App Store:
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Vibes News
naukricard.com › blog › icloud-upgrade-not-working-heres-1763068476635
ICloud Upgrade Not Working? Here's How To Fix It
November 13, 2025 - Go to Settings Your Name iCloud Manage Storage Change Storage Plan, select your desired storage plan, and follow the prompts to confirm your purchase. Updating to the latest software can often resolve compatibility issues and allow the upgrade to proceed smoothly. Believe it or not, having ...
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Apple Community
discussions.apple.com › thread › 255337282
Cannot upgrade iCloud - Apple Community
If you're having trouble upgrading to a new iCloud+ plan, you can initiate the upgrade from iCloud.com, then continue on your Mac or iPhone. To get started, visit https://www.icloud.com/. Log in, then scroll down to the bottom and choose "Your Plan". Next, in the "How to Change Your iCloud ...