Skip to main content
KingSpec MemoStone 512GB External SSD, USB 3.2 Gen2 Dual Type A/C Interface - Up to 540MB/s, Portable Solid State Drive Perfectly Compatible with Smartphones/Laptops/Tablets/Desktops
KingSpec

KingSpec MemoStone 512GB External SSD

Bottom line: The KingSpec MemoStone 512GB External SSD ($68.99 on Amazon as of 2026-10-07): Reads up to 540MB/s and writes up to 480MB/s for fast large-file and HD video transfers; main trade-off: tops out near 540MB/s, well below the 10Gbps limit of its USB 3.2 Gen2 link.

$68.99

As an Amazon Associate, SpecPicks earns from qualifying purchases. Full disclosure →

Buy on Amazon — $68.99 Compare to similar external storage

By , Founder & Editor-in-Chief · Listing data updated

Mike Perry — Hardware researcher since 2014. For external drives and portable storage, synthesises manufacturer specs and independent reviews rather than first-hand lab testing. Core beat: GPU performance across gaming, rendering, and local-LLM inference.

*Price sourced from Amazon.com. Last updated 2026-10-07. Price and availability subject to change.

Pros & Cons

Pros

  • ✓ Reads up to 540MB/s and writes up to 480MB/s for fast large-file and HD video transfers
  • ✓ Built-in USB Type-A and Type-C plugs, so one drive works with older and newer ports
  • ✓ Metal casing helps protect the drive from accidental bumps in a bag
  • ✓ 3D NAND flash improves durability and read/write speeds
  • ✓ Works with smartphones, tablets, laptops and desktops

Cons

  • ✗ Tops out near 540MB/s, well below the 10Gbps limit of its USB 3.2 Gen2 link
  • ✗ Writes (480MB/s) are slower than reads, so big backups take longer
  • ✗ 512GB fills quickly with 4K video; the 2TB version costs more
  • ✗ No hardware encryption or password protection listed

Related Products

Other products in this category you may like:

SpecPicks Verdict

SpecPicks scored KingSpec MemoStone 512GB External SSD using a rating × review-volume × price-fit model applied to published specs and reviews across the external storage category. KingSpec's external storage lineup sits within the broader category mid-tier; price and specs are the deciding factors over brand loyalty here. Judge it on the specification table and the price rather than on sentiment: check the figures that decide your use case, then put it side-by-side with two or three close alternatives in the Compare tool before clicking through.

Common buyer scenarios for external storage of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the retailer's listing before purchase. Prices and stock are set by the retailer and may have moved since this page was last updated.

Key Features

  • Ultra-Fast Transfer: Achieve read speeds up to 540MB/s and write speeds up to 480MB/s, easily transfer large files and HD media, saving time and enhancing work efficiency
  • Wide Compatibility: Equipped with USB Type A and Type C interfaces, compatible with smartphones, laptops, tablets, and desktops, meeting the needs of various devices
  • Large Storage Capacity: Offers up to 2TB of storage space, sufficient for storing a vast number of photos, videos, and work documents, perfectly suited for business needs
  • Durable Metal Casing: Features a metal casing design that protects against accidental bumps, ensuring data security and making it ideal for portable use
  • 3D NAND Technology: Utilizes advanced 3D NAND storage chips, providing faster read/write speeds and higher durability, ensuring data security and reliability

Full Specifications

BrandKingSpec
ColorGray
Model NameUS4
Read Speed540 megabytes_per_second
Unit Count1 Count
Form Factor2.5-inch
Media Speed480 megabytes_per_second
ConnectivityUSB
Model NumberUS4-512
Built-In MediaUS4 external SSD
Hard Disk Size512 GB
Hard-Drive Size512 GB
Number of Items1
Special FeatureBackward Compatible, Error Checking and Correcting (ECC), Native Command Queuing, TRIM Support, Wear Leveling and Over Provisioning
Installation TypeExternal Hard Drive
3D NAND TechnologyUtilizes advanced 3D NAND storage chips, providing faster read/write speeds and higher durability, ensuring data security and reliability
Compatible DevicesDesktop, Laptop, Smartphone, Tablet
Data Transfer Rate540 megabytes_per_second
Enclosure MaterialMetal Casing
Wide CompatibilityEquipped with USB Type A and Type C interfaces, compatible with smartphones, laptops, tablets, and desktops, meeting the needs of various devices
Full listing titleKingSpec MemoStone 512GB External SSD, USB 3.2 Gen2 Dual Type A/C Interface - Up to 540MB/s, Portable Solid State Drive Perfectly Compatible with Smartphones/Laptops/Tablets/Desktops

Ready to buy?

KingSpec MemoStone 512GB External SSD, USB 3.2 Gen2 Dual Type A/C Interface - Up to 540MB/s, Portable Solid State Drive Perfectly Compatible with Smartphones/Laptops/Tablets/Desktops is listed on Amazon. Price, availability, shipping and returns are set by Amazon and its sellers — check the listing for current terms. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.

Buy on Amazon — $68.99

*Price sourced from Amazon.com. Last updated 2026-10-07. Price and availability subject to change.

Related External Storage

Keep exploring SpecPicks

Other buying guides

Browse the catalog

Editorial

More guides & deep dives from the SpecPicks archive

Browse all articles & guides →

More reviews from the SpecPicks archive

Browse all reviews →

Earliest SpecPicks reviews

Browse full archive →
KingSpec MemoStone 512GB External SSD, USB 3.2 Gen2 Dual Type A/C Interface - Up to 540MB/s, Portable Solid State Drive Perfectly Compatible with Smartphones/Laptops/Tablets/Desktops
$68.99
View on Amazon →