Ginger is one of the spices that can be preserved well by freezing. To preserve ginger in the freezer, you need to peel and wash the whole ginger root, place it in airtight containers and freeze.
Or you can use plastic wrap to wrap around the ginger root. If using zip bags, you need to squeeze all the air out of the bags before placing them in the freezer for storage. Fresh ginger stored in the freezer does not need to be defrosted before use. You should use a tool to grate frozen ginger root in just the right amount as needed and store the rest in the freezer.