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A 1TB SSD is a solid-state drive advertised with one terabyte of storage capacity. “SSD” describes the type of storage device; “1TB” describes its stated capacity, not its speed or a particular model. The advertised capacity is usually measured in decimal units, so a computer may display a smaller number without the drive having lost storage.
What does 1TB mean on an SSD?
SSD stands for solid-state drive, a storage device. The 1TB label refers to the drive’s nominal capacity: manufacturers commonly define 1 terabyte as 1,000,000,000,000 bytes. It does not tell you the drive’s read or write speed, interface, endurance, or physical size.
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Why can a 1TB SSD show about 931GB?
Storage manufacturers generally count capacity using decimal units, while some computer systems report it using binary units. The units have different sizes: a decimal terabyte is 1,000,000,000,000 bytes, while a binary terabyte is 1,099,511,627,776 bytes. As a result, the same byte count can appear as a smaller number when expressed in binary-based units.
Intel gives an example in which a 1TB drive converts to about 931.32 binary GB. That is an approximate unit conversion, not a measurement of every drive’s available space. The exact number shown can vary with the system’s display conventions and how the drive is prepared for use. Intel explains the advertised-versus-reported capacity difference; Apple’s storage-capacity guide describes the decimal and binary units.
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- Ideal for high speed, low power storage
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- Up to 6,000MB/s read, 4,000MB/s write
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Is 1TB the same as 1000GB?
In decimal units, yes: 1TB equals 1,000GB, or 1,000,000,000,000 bytes. Binary units use different definitions, which is why a system that reports binary-based values may show a figure near 931GB for the same decimal 1TB. The label “GB” can be used by different systems in different ways, so the number alone does not always make the unit convention clear.
Why might available space be lower still?
The converted capacity is not necessarily the space available for files. Formatting and operating-system software use some storage, so the usable-space figure can be lower. The amount depends on the device and its setup; a single exact available-space figure cannot be promised for every 1TB SSD. Apple notes both the decimal measurement convention and storage used by formatting and system software in its capacity explanation.
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- This product has been replaced by our latest generation. Please search for the SANDISK Optimus GX 7100 NVMe SSD
- HIGH-OCTANE GAMING. Experience speeds up to 7,250MB/s read and 6,900MB/s write (1-2TB models), with up to 35% faster performance than previous generation.
- PURPOSE-BUILT. Designed for serious on-the-go gamers, with a PCIe Gen4 interface and SANDISK’s next generation TLC 3D NAND.
- MORE TIME TO CLEAR THAT CHECKPOINT. Built with laptops and handheld gaming devices in mind, with up to 100% more power efficiency over the previous generation.
- DO MORE WITH DASHBOARD. Ensure your drive is optimized for prime performance with the downloadable WD_BLACK Dashboard (Windows only).
What 1TB does—and does not—tell you
Capacity is only one specification. The 1TB label does not establish whether a drive fits or works with a particular computer. Compatibility depends on details such as the computer’s supported form factor and interface, which the capacity label does not identify. Nor does capacity alone establish speed or endurance.
For additional explanations of storage-unit conventions, see Samsung Semiconductor’s byte guide and Seagate’s storage-capacity measurement guide.
Quick Recap
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- High-Efficiency Performance: The SSD 1TB SATA adopts 3D NAND flash memory, which achieves a read speed of up to 560MB/s and a write speed of up to 510MB/s. Get a faster data transfer experience and improve your work efficiency.
- Upgrate Your Computer: The SATA 1TB SSD achieved faster app load and response times, and faster boot-up and shut-down, compared to HDDs. The internal SSD adopts advanced SLC Cache Technology, which improves overall computer performance.
- Reliability and Stability: The 2.5 SSD 1TB supports garbage collection, advanced wear-leveling technology, RAID, ECC, TRIM, and S.M.A.R.T, which makes the SATA SSD more reliable and stable. With the characteristics of shockproof, the SSD hard drive can keep your data safe, without worry even if your computer drops.
- Wide Compatibility: The 2.5'' SSD built-in SATA III 6Gb/S interfaces, witch backwards compatible with SATA II and SATA interfaces. The Internal SATA SSD is compatible with Windows, Linux, and Mac OS, and compatible with laptops, desktops, and all-in-one computers.
- 3-Year Service: Our SSDs come with a 3 years after-sales service and lifetime technical support. If you have any questions, please contact us and we will sincerely and professionally solve the problem for you.
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- HUGE SPEED BOOST: Get random read/write speeds that are 40%/55% faster than 980 PRO; Experience up to 1400K/1550K IOPS, while sequential read/write speeds up to 7,450/6,900 MB/s reach near the max performance of PCIe 4.0*
- BREAKTHROUGH POWER EFFICIENCY: Use less power and get more performance; Enjoy up to 50% improved performance per watt over 980 PRO, plus optimal power efficiency with max PCIe 4.0 performance**
- SMART THERMAL CONTROL: Samsung's own nickel-coated controller delivers effective thermal control; With its slim size, 990 PRO is a perfect fit for desktops and laptops that meet the PCI-SIG D8 standard***
- THE CHAMPION MAKER: Up to 65% improvement in random performance enables faster loads for an ultimate gaming experience on PS5 and DirectStorage PC games****
- SAMSUNG MAGICIAN SOFTWARE: Get the most out of your SSD with Samsung Magician's advanced yet intuitive optimization tools; Monitor drive health, protect valuable data, and receive important updates for your 990 PRO
Rank #3
- Solid state performance with up to 800MB/s read speeds in a portable drive. (Based on internal testing; performance may be lower depending on host device, interface, usage conditions and other factors. 1MB=1,000,000 bytes.)
- Back up your content and memories on a storage solution that fits seamlessly into your mobile lifestyle.
- Take it with you on your adventures—up to two-meter drop protection means this durable drive can take a beating. (Based on internal testing.)
- Secure it to your belt loop or backpack for extra peace of mind thanks to the tough rubber hook.
- From Sandisk, a brand professional photographers trust to take on assignments.
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