If the storage capacity is rather small, it means it will fill up with files faster, whereas a drive that has lots and lots of storage can handle much more data. The hard disk drive capacity is a significant factor in determining whether someone will buy a particular device like a laptop or phone.Welcome to our SSD vs HDD guide, where we'll look at the pros and cons of traditional hard drives (HDD) and solid state drives (SSD) to help you choose which one is the best for your needs.Intel's eyeblink-fast Optane SSD 905P, an internal SSD tested as a PCI Express card, is for extreme power users who can stomach its wildly high pricing and truly leverage its field-leading.