Hello Brooke,
Thank you for reaching out about your storage purchase not showing up in your files I understand how frustrating it can be to expect additional storage and not see it reflected after waiting for a couple of days. You’ve already taken the right step by purchasing more storage and it’s completely reasonable to want clarity on why it hasn’t appeared yet.
In most cases purchased storage should update within 24 hours but sometimes it can take up to 48 hours due to account synchronization or payment processing delays. To resolve this please confirm that the purchase was completed successfully by checking your subscription status in your account settings. If the storage still isn’t reflected after 48 hours signing out and back into your account or restarting your device can help refresh the changes. If the issue persists contacting Microsoft Support will ensure they can verify and apply the storage to your account.
Could you check your subscription details and let me know if the additional storage appears there?
I hope this answer is helpful if you have further questions feel free to reply back
Regards,
Marcelo