Even without any performance improvements, Samsung gets recognition for introducing the first viable 2TB SSDs. Not everyone needs a drive with this much capacity, and the price tags will sort out the true believers from the tire-kickers. Desktop enthusiasts always have the option to add 4TB+ hard drives to their machines. But mobile users are more space-constrained; they don't have that flexibility. Cloud storage was supposed to be the mobile storage savior; however, it seems like the only ones excited about that are ISP executives.
In my experience, there is no doubt about the need for the products Samsung is introducing. As I type, I'm also trying to move several hundred gigabytes of data from my notebook to keep its free space indicator out of the red. This is a common problem that is slowly being eliminated by larger, lower-priced flash-based devices. Samsung's new 2TB options will further reduce the time between notebook data flushes to NAS or other backup appliances.
We spent a lot of time exploring the 850 Pro 2TB performance abnormality we found, but not enough to isolate the problem. This is a bad time for Samsung to have firmware issues. Some users are still reporting slow-downs on the 840 EVO, even after the company attempted multiple fixes. The 840 EVO is the best-selling client SSD of all time. But the transition to three-bit-per-cell flash may have come too soon or without powerful-enough ECC to tame it.
The new 850 EVO 2TB, on the other hand, could be one of the best client SSDs ever released. The smaller EVO models managed to keep TLC performance at MLC levels. However, the largest capacity point moves the 850 EVO into SanDisk Extreme Pro territory. It's now a part of the top performance tier thanks to even larger TurboWrite emulated SLC memory that can even keep large transfers in single-bit-per-cell latency levels.
The largest drawback to both new Samsung 2TB SSDs is their price. Without competition, Samsung can ask almost as much as it wants. The 850 Pro 2TB runs $999. The 850 EVO 2TB is almost a value in comparison at $799. The comments section is going to dislike this, but once you look at the EVO 2TB for all it offers, that value story comes into greater focus. Samsung could have placed a premium on the 850 EVO 2TB, but the MSRP is in line with current pricing, twice what you'd pay for the 1TB EVO.