SSD vs HDD
SSDs are faster and more reliable for everyday use; hard drives are cheaper per gigabyte and still make sense for bulk storage. For a computer's main drive, an SSD is almost always the better choice today.
Speed
SSDs have no moving parts and access data electronically, making them dramatically faster than mechanical hard drives for everyday tasks like starting up and opening programs.
Reliability and durability
Without moving parts, SSDs are more resistant to the kind of physical shock and mechanical wear that causes hard drives to fail over time, though both eventually reach end of life.
Cost and capacity
Hard drives remain cheaper per gigabyte at larger capacities, which is why they're still common for bulk storage — external backup drives, large media libraries — even on computers where the main drive is an SSD. This page will be expanded with more detailed comparisons in a future update.