A Microsoft file hosting and synchronization service.
Hello
Judging by the price, it is for Microsoft 365 Basic, which is for 100GB of OneDrive storage.
Please verify that's indeed what you have https://account.live.com > subscription.
If you just subscribed to it, it can take up to 48 hours for your storage to be provisioned and see difference. If it has been more than 48 hours, you would need to contact Microsoft billing support. 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.