iPhone Duo is available with 256GB, 512GB and 1TB of storage, giving buyers three options depending on how much space they need for apps, photos, videos and downloaded content.
The 256GB model is the entry point and should provide enough space for many users who rely heavily on iCloud Photos and streaming services. Moving to 512GB provides considerably more room for large photo libraries, games and offline media, while the 1TB model is aimed at users who want the most local storage possible.
Storage cannot be expanded later with a memory card, so the capacity chosen when buying iPhone Duo is the amount of built-in storage the device will have for its lifetime. iCloud storage is separate and does not increase the physical storage inside the iPhone.
Which iPhone Duo storage size should you choose?
For most buyers, 256GB is likely to be the sensible starting point, particularly when iCloud is used for photos and files. The 512GB option makes more sense for people who regularly keep large amounts of content locally, while 1TB provides the most flexibility for heavy users.
Anyone upgrading from an existing iPhone can check Settings > General > iPhone Storage before ordering. If current usage is already approaching the capacity of the old device, choosing the next storage tier can provide useful breathing room for the years ahead.
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