S20 2.5-inch SATA III SSD
The addlink S20 is a 7 mm, 2.5-inch SATA SSD for replacing a hard drive in a compatible laptop or desktop. It uses 3D TLC NAND and is available in 120GB, 256GB, 512GB, 1TB, and 2TB capacities. The 2TB model delivers sequential speeds of up to 550 MB/s read and 500 MB/s write over SATA III. Speeds vary by capacity.
Sequential Read Speed: S20 SSD vs. HDD
S20 2TB: up to 550 MB/s. Reference HDD: 100 MB/s.
5.5x Faster
than HDD
The S20 datasheet compares the 2TB model’s maximum sequential read speed with a 100 MB/s reference HDD. Actual speeds vary by drive, host interface, and workload.
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Excellent Compatibility for Upgrades
The S20 fits a 2.5-inch SATA drive bay with at least 7 mm of clearance. Before upgrading, check your computer’s drive bay, SATA connector, and mounting hardware.
High Quality
3D NAND
2.5” Design
Slim 7mm
Design and Reliability Features
Enhanced Durability / Reliability
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3D NAND, SmartECC™, and SmartRefresh™ help maintain stable performance and long-term reliability.
End-to-end Data Protection
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SmartECC™ helps protect data integrity by correcting errors during reads and writes.
Low Power Consumption
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Designed for energy-efficient operation in laptops and desktops.
Multi-Device Versatility
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Best-value 2.5” SATA SSD for everyday laptop/desktop upgrades and HDD replacement.
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Laptop users upgrading from HDD to SSD for a faster, quieter system
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Desktop PCs needing a reliable OS / application drive
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Home office setups that benefit from faster boot and snappier multitasking
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Budget gaming PCs that want quicker load times on a SATA system
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External 2.5” enclosures for portable backups and file shuttling (SATA-to-USB)
Media Recommendations
"By using only high-quality flash chips and enhanced firmware algorithms, the S20 SSD is guaranteed to provide greater performance and reliability."
" I picked up the 256GB variant for my 2012 MacBook Pro running a 2TB Seagate SSHD Gaming Drive. After purchasing three SSDs for my 2010 Mac Pro, it was time to give my 2012 MacBook Pro a little SSD love!"
" TBW doesn’t mean instant failure—it’s mainly a warranty limit. S20 endurance tests show it can meet, even exceed, the rated TBW."
" All the information I've reviewed indicates that Addlink SSDs have excellent benchmark results. I'm considering buying one to build an HTPC."
Why Choose the addlink S20?
The S20 gives a compatible SATA computer a straightforward path from a mechanical hard drive to solid-state storage. Its 7 mm profile fits many 2.5-inch laptop bays, while the five capacity options let you choose the space you need for your operating system, applications, and files.
Key Features
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2.5-inch SATA III 6 Gb/s interface and 7 mm drive height.
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Five capacities from 120GB to 2TB.
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Up to 550 MB/s sequential read and 500 MB/s sequential write on the 2TB model.
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3D TLC NAND with LDPC error correction, wear leveling, TRIM, and SMART support.
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Three-year limited warranty. See the addlink Warranty Policy for full terms.
Capacity Options
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120GB / 256GB / 512GB / 1TB / 2TB
Ideal For
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HDD replacement to speed up older laptops and desktops
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OS + apps drive upgrades for faster startup and daily responsiveness
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Everyday computing: office, schoolwork, web, and light content tasks
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Budget gaming builds that want improved loading on SATA systems
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External 2.5” enclosure users needing portable backups
* *Sequential performance varies by capacity, system configuration, SATA controller, driver/OS, workload, and available free space.
** Limited warranty: 3 years. Please check Warranty Policy for details.
Test Conditions / Benchmark Notes
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Benchmark tool: CrystalDiskMark (default profile)
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Interface notes: Best results on SATA III 6Gb/s; SATA II/I will cap peak throughput
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System factors: SATA controller/chipset, driver/firmware, OS background tasks
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Workload factors: test file size, queue depth, and free space
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Note: All speeds are “up to” values; actual results depend on configuration and conditions