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You can definitely freeze grated coconut; they will last about 1/2 a year in the freezer. For easy portioning, pack them into ice cube trays, freeze, and then transfer them into a bag. Or roll little balls of the coconut, arrange on a sheet tray, then transfer to a bag. Either way.
As far as them being dried and used for flour or used for milk, I'm not positive on that. But I'm going to guess yes.
(And the creamiest, too.)
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