If you're a movie buff or just like to take a lot of pictures during holidays, the 4TB NAS hard drives are what you're looking for. With a total storage capacity of 4000GB, there's space for up to 400,000 photos or more than 100 hours of movies. With an NAS HDD of 4TB, you always have enough space at your disposal and you can create a RAID setup more easily. This could be a WD Red Plus 4TB HDD to quickly process your data, or a Seagate EXOS drive if you own a small company.