Most cloud storage services will give you the option of seeing which devices are connected to your account, usually through ...

You can change the iCloud account on your iPad by signing out of your old account and into a new one, or add a different account for app purchases.

You can check your iCloud email on a computer through the Mail app on a Mac or through iCloud's desktop website.

The iCloud storage that comes with your Apple account can be useful for offloading large files on your iPhone, but even the cloud can get full. Here are some techniques to ease the cloud pressure.