To freeze shredded potatoes, blanch the shredded potatoes in boiling water, rinse with cold water, and store in freezer bags or containers. Shredded potatoes last for one year in the freezer.
Shred the potatoes into a bowl of cold water. Once they are all shredded, drain the potatoes, and put them in a pot of boiling water for three minutes to blanch them. Drain the potatoes, rinse them in cold water, and drain once more. Pat the potatoes dry, and then store them in an appropriate freezer container. Write the date on the container so they are not stored for longer than one year.