The OCZ Technology Z-Drive 4500 1.6TB is a 2.5" 1600GB Solid-State Drive.
The OCZ Technology Z-Drive 4500 1.6TB is a solid-state drive, which means it stores data using flash memory similar to how USBs store data, but much more effectively. Solid-state drives perform much more effectively than hard disk drives, with faster read/write speeds, lower latencies, and even higher physical shock resistance, but come at a price premium. An SSD will cost much more than an HDD with an equivalent storage capacity - although SSDs are becoming cheaper and more viable over time. A common choice is to use a small SSD for an OS installation such as Windows for fast boot times and OS performance, and to use an HDD for applications and files. This avoids the negative point that over-use of data-writing can eventually lead to SSD degradation (although modern SSDs are said to take years before degradation), because Windows does not write much data, but its data is read often.
The OCZ Technology Z-Drive 4500 1.6TB is a bottom of the range SSD and should definitely be avoided in favor of an HDD at this level of performance.
Its read speed of 2900MB/s is extremely fast, which should provide the quickest loading speeds within applications that are possible with consumer hardware. Its write speed of 2200MB/s is extremely fast, which should allow you to store data at lightning speeds.
With a capacity of 1600GB, the OCZ Technology Z-Drive 4500 1.6TB has more storage space than a large HDD, which is an exceptionally impressive feat of engineering within an SSD. However big the drive, an SSD should always have enough unused memory to be able to rotate space and minimize the reuse of the same areas of the drive. Because each block of space has a limited lifespan, by spreading out the reuse of space it prolongs the lifespan of the SSD as a whole.