If you have raw uncooked fries that you want to store and keep longer than a few days you should place the uncooked raw fries in a Ziploc sealed bag.
Then place the fries in a freezer and the fries should last in the freezer for 6 months to a year before they start turning brown and going bad.
Even when the fries start turning a different color the fries as long as they have remained frozen will still be okay and safe to eat.
I've had fries last in the freezer for over a year although the fries were not as fresh as before but the fries were still very safe to eat.
I will sometimes use my french fry cutter and cut up some potatoes and then blanch the potatoes and then place the fries in the freezer using Ziploc bags.