Storage of uncooked french fries
4-5 days would be a stretch.  Oxidation causes a taste and sight change to the cut fries that is typically un-appealing.  While 4-5 days; it would technically be safe to eat; the taste may be off.

Typically in restaurant world we would pre-cut and store for 24 hours in a water bath in the walk-in.  

Alternatively they would be frozen; but this alters the flavor also (somewhat less though)...