Buying a new phone leaves you with an older one that is pretty much useless unless you trade it in. No one really needs a second phone unless it is for work. Once you've moved your contacts and photos over, it's easy to forget the old phone is still useful when repurposed. It won't lose any of the features that make it such a good mini computer, and you should take advantage of that.
How-To Geek
You don't need a USB flash drive—your old phone is a better portable file server
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