SSD. Stands for "Solid State Drive." An SSD is a type of mass storage device similar to a hard disk drive (HDD). It supports reading and writing data and maintains stored data in a permanent state even without power. Internal SSDs connect to a computer like a hard drive, using standard IDE or SATA connections
SSDs are more reliable when it comes to harsh environments than HDDs because they don't have actuator arms or any moving parts. As such, SSDs can withstand accidental drops and extreme temperatures better than HDDs. But that's not to say that all SSDs are the same.