Samsung has announced that it has begun mass production of first 1TB flash storage for next-generation mobile devices and it utilizes 16 stacked layers of 512-gigabit (Gb) V-NAND chips. It uses the same 11.5mm x 13.0mm package as the previous 512GB version, but this uses a newly developed proprietary controller. This will allow users to store 260 10-minute videos in 4K UHD (3840×2160) format, compared to 13 videos of the same size in 64GB eUFS.
The 1TB eUFS offers up to 1,000 megabytes per second (MB/s), offers up to 58,000 IOPS random read speed, which is up to 38 percent over the 512GB version and the random writes at up to 50,000 IOPS are 500 times faster than a high-performance microSD card (100 IOPS).
Samsung said that it plans to expand the production of its fifth-generation 512Gb V-NAND at its Pyeongtaek plant in Korea throughout the first half of 2019 to bring the 1TB eUFS to smartphones. Last year’s Samsung Galaxy Note9 was introduced in 512GB version for the first time, and the 1TB storage will likely debut with the Galaxy S10+ next month, which is also rumored to come with 12GB of RAM.
Samsung has also listed its journey from eMMC 4.5 with 140 MB/s read speed to 1TB eUFS 2.1 offering 1000 MB/s speed.
| Memory | Sequential Read Speed |
Sequential Write Speed |
Random Read Speed |
Random Write Speed |
| Samsung 1TB eUFS 2.1 (Jan. 2019) |
1000 MB/s | 260 MB/s | 58,000 IOPS | 50,000 IOPS |
| Samsung 512GB eUFS 2.1 (Nov. 2017) |
860 MB/s | 255 MB/s | 42,000 IOPS | 40,000 IOPS |
| Samsung eUFS 2.1 for automotive (Sept. 2017) |
850 MB/s | 150 MB/s | 45,000 IOPS | 32,000 IOPS |
| Samsung 256GB UFS Card (July 2016) |
530 MB/s | 170 MB/s | 40,000 IOPS | 35,000 IOPS |
| Samsung 256GB eUFS 2.0 (Feb. 2016) |
850 MB/s | 260 MB/s | 45,000 IOPS | 40,000 IOPS |
| Samsung 128GB eUFS 2.0 (Jan. 2015) |
350 MB/s | 150 MB/s | 19,000 IOPS | 14,000 IOPS |
| eMMC 5.1 | 250 MB/s | 125 MB/s | 11,000 IOPS | 13,000 IOPS |
| eMMC 5.0 | 250 MB/s | 90 MB/s | 7,000 IOPS | 13,000 IOPS |
| eMMC 4.5 | 140 MB/s | 50 MB/s | 7,000 IOPS | 2,000 IOPS |