A backup may not be possible and the iCloud storage suddenly full after purchase due to a few reasons. One possibility is that the device may not be connected to Wi-Fi, which is necessary for iCloud backups to occur. Another reason could be that the purchased storage may not have been properly activated or synced with the device. Additionally, if there are a large number of photos, videos, or other files on the device, it could quickly fill up the iCloud storage, especially if the purchased storage plan is not sufficient for the amount of data being backed up. **

When you purchase iCloud storage, you are essentially buying additional space on Apple's cloud servers to store your files, photos, and other data. You can choose from different storage plans based on your needs, ranging from 50GB to 2TB. The cost of the storage plan is billed monthly to your Apple ID account. Once you purchase a plan, your iCloud storage capacity will increase, allowing you to backup more data from your Apple devices. **

Yes, you can purchase iCloud storage with Apple Pay. When you upgrade your iCloud storage plan on your iPhone, iPad, or Mac, you have the option to use Apple Pay as a payment method. This allows for a quick and secure transaction using your Apple Pay credentials. **

Yes, you can purchase an iCloud storage upgrade using iTunes credit. When you make a purchase for iCloud storage upgrade, the payment will be deducted from your iTunes credit balance. This is a convenient way to use your existing iTunes credit to increase your iCloud storage capacity. Just make sure you have enough credit in your iTunes account to cover the cost of the storage upgrade. **

The request for using Apple Family Sharing to purchase a credit card is not possible. Apple Family Sharing is a feature that allows family members to share purchases from the App Store, iTunes, and Apple Books. However, it does not extend to purchasing financial products such as credit cards. Each family member would need to apply for their own credit card individually. **

To use an iTunes gift card to purchase iCloud storage, you can redeem the gift card in the App Store or iTunes Store. Once the gift card is redeemed and the balance is added to your Apple ID account, you can use that balance to purchase iCloud storage. Simply go to your iCloud settings on your device, select the storage plan you want to purchase, and choose the option to use your Apple ID balance as the payment method. **

To purchase 50 GB or 200 GB of iCloud storage space, you can do so directly from your Apple device. Simply go to your device's settings, tap on your name, select iCloud, then tap on Manage Storage. From there, you can choose the desired storage plan and proceed with the purchase. Alternatively, you can also purchase iCloud storage space through the iCloud settings on a Mac computer or by visiting the iCloud website on a web browser. **

One can purchase Microsoft Office as a one-time purchase by buying a standalone version of the software, such as Microsoft Office Home & Student or Microsoft Office Home & Business. These versions do not require a subscription and can be purchased for a one-time fee. They can be bought online from the Microsoft Store or from authorized retailers. After purchasing, the software can be downloaded and installed on the user's device for perpetual use. **