Using New Outlook on Windows for personal email, calendar, and contact management
Hello
Please ignore the AI answer above as that's specific for commercial accounts, not personal.
How long ago did you purchase the Ms365 Personal? It can take up to 48 hours for you to see the storage increase.
Also, can you go to your account https://account.live.com > Subscription, make sure the subscription is indeed listed and is active.
If it has been 48 hours, you would need to contact support to have them correct this for you.
To get help, open the "Get Help" app on your computer (just search for it in the Start menu). or go to https://support.microsoft.com/contactus, Type "Billing" and press Enter. On the next screen, click "Contact support" at the bottom of the page, then choose "Microsoft 365" > "Manage my subscription". You’ll then see the option to chat with a Microsoft support agent who has access to your account to help review the issue.