Summary
iCloud is a cloud-based storage system that allows users to store files and data on all their devices, allowing them to access them on all their devices and keep them up to date across all devices.
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iCloud Drive is a secure way to access documents from multiple devices, including iPhones, iPads, iPod touches, Macs, and Windows PCs, and allows users to store files and folders up to date across all devices.
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Your files upload to iCloud each time your device connects to the internet, and depending on your internet speed, the time it takes for you to see your files on your other devices might vary.
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