First, let's break down these two acronyms. FFC stands for Flexible Flat Cable and refers to any type of electrical cable that is flat and flexible, with flat solid conductors (see our selection of laptop FFCs).
Sometimes an FFC is called a ribbon cable as it is a miniature form of a ribbon cable.
HDD means Hard Disk Drive and refers to the storage device inside your computer that maintains storage even when the computer is turned off.
A cable is necessary to connect the hard drive to the computer motherboard or main circuit board; these HDD cables will have varying numbers of pins, so make sure to check how many pins you need before purchasing a new HDD FFC.