Looking Beyond the KingSpec MemoStone 512GB Dual USB? 6 Alternatives Worth a Look
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Exploring kingspec memostone 512gb external SSD alternatives helps you match drive hardware to your specific workflow. The original KingSpec MemoStone performs well for portable storage, offering read speeds up to 540MB/s and write speeds up to 480MB/s over a USB 3.2 Gen2 interface. Its built-in USB Type-A and Type-C connectors provide direct connectivity across laptops and desktops without separate adapters. The metal casing protects the drive during transit, while 3D NAND flash handles daily file transfers reliably.
You might look for a different drive if you need internal mounting, faster interface bandwidth, or another brand. Systems with open motherboard slots can accommodate PCIe 3.0 M.2 NVMe drives reaching up to 3,200MB/s, while systems with drive bays utilize standard 2.5-inch SATA III connections. The 6 alternatives here were chosen because their specifications overlap with the original drive, including a matching 512GB capacity and broad PC compatibility. Evaluating these specifications allows you to choose between external plug-and-play convenience and dedicated internal drive performance.
Our top pick: KingSpec MemoStone 512GB Dual USB External SSD.
Comparing the KingSpec MemoStone Alternatives
TEAMGROUP GX2 512GB SATA III 2.5-Inch SSD
The TEAMGROUP GX2 swaps the KingSpec MemoStone portable design for an internal 2.5-inch SATA III form factor. Instead of offering on-the-go data transfers across phones and PCs via dual USB Type-A and Type-C connectors, this drive mounts inside a desktop or laptop bay. It includes DevSleep efficiency to reduce power draw while idle and utilizes 3D NAND TLC memory. You give up the MemoStone pocketable metal casing and direct external connectivity. In exchange, you get a dedicated internal drive measuring 3.94 by 2.75 inches for your operating system or secondary storage. Choose the GX2 if you want to replace an internal mechanical drive or expand existing SATA bay capacity rather than carry loose files.
TEAMGROUP MP33 512GB PCIe 3.0 M.2 SSD
The TEAMGROUP MP33 shifts from external USB convenience to internal PCIe 3.0 NVMe performance. It reaches sequential read speeds up to 1700 MB/s, significantly surpassing the 540 MB/s read and 480 MB/s write ceilings of the KingSpec MemoStone. The drive uses an M.2 2280 form factor with 3D TLC NAND, SLC caching, and a 5-year limited warranty. To gain this higher transfer rate, you sacrifice the MemoStone dual USB-A and USB-C ports, as well as its protective metal shell. You cannot plug it directly into phones or tablets without an enclosure. Pick the MP33 if you want faster data throughput installed straight onto an open desktop or laptop motherboard slot.
Timetec 512GB PCIe 3.0 M.2 SSD
The Timetec M.2 NVMe drive delivers sequential read speeds up to 2,000 MB/s, which outpaces the KingSpec MemoStone top read rate of 540 MB/s. It utilizes a PCIe Gen3x4 interface, an SLC cache, and 3D NAND to handle heavier internal workloads. However, you give up the MemoStone portable metal chassis and its dual Type-A and Type-C USB connectors. The Timetec cannot function as a plug-and-play external stick for quick swapping between phones, tablets, and laptops. Instead, it requires an open internal M.2 2280 motherboard slot. You should choose this Timetec SSD if you need an affordable internal speed boost for desktop or laptop tasks rather than mobile external storage.
Fanxiang 512GB 2.5-Inch SATA SSD
The Fanxiang S101 is an internal 2.5-inch SATA III drive rather than a pocketable external USB solid-state drive. It provides consistent 500 MB/s read and write speeds using 3D NAND TLC storage, putting it close to the KingSpec MemoStone 540 MB/s read and 480 MB/s write ratings. What you give up is the MemoStone dual USB Type-A and Type-C hardware, its durable metal casing, and immediate multi-device portability. The Fanxiang drive measures 3.94 by 2.72 inches and must be wired into a standard PC drive bay. Choose this Fanxiang SATA drive if you want dedicated, permanently mounted internal storage for an older desktop or laptop instead of a travel drive.
Fanxiang 512GB PCIe 3.0 NVMe SSD
The Fanxiang S501 trades the KingSpec MemoStone portable USB setup for internal PCIe Gen3x4 NVMe throughput. It achieves sequential read speeds up to 2,150 MB/s, nearly quadrupling the MemoStone 540 MB/s read limit. In return, you surrender the MemoStone external metal body and its dual-interface USB Type-A and Type-C connectors that work across tablets and phones. The S501 requires an M.2 2280 motherboard slot and specifically does not support the PS5. It measures 3.14 by 0.86 inches and weighs virtually nothing inside your chassis. Select the Fanxiang S501 if your main goal is increasing internal PC storage speeds rather than shuttling files between external devices.
Fanxiang S500 Pro 512GB NVMe SSD
The Fanxiang S500 Pro delivers up to 3200 MB/s read speeds and an endurance rating of 320TBW, outperforming the KingSpec MemoStone 540 MB/s maximum read rate. Built as an internal M.2 2280 PCIe 3.0 drive, it incorporates 3D NAND TLC flash, an SLC cache, and bundled installation tools. You sacrifice the MemoStone pocket-ready metal housing and its dual Type-A and Type-C external connections. The S500 Pro cannot simply plug into external USB ports across phones or desktops; it must be installed into a compatible motherboard slot. Choose the S500 Pro if you demand substantially higher bandwidth and dedicated write endurance for an internal PC upgrade.
Quick picks
Our 7 picks
KingSpec MemoStone 512GB Dual USB External SSD
Best for: dual-port everyday external file transfers
- Storage Capacity
- 512GB
- Interface
- USB 3.2 Gen2
- Max Read Speed
- 540MB/s
- Max Write Speed
- 480MB/s
- Compatibility
- Laptop, Desktop
- Dimensions
- 3.35 × 0.85 × 0.31 inches
View on Amazon: KingSpec MemoStone 512GB Dual USB External SSD Affiliate link
The KingSpec MemoStone is an external portable SSD offering 512GB of 3D NAND storage in a metal casing. You get dual USB 3.2 Gen2 Type-A and Type-C connectors, removing the need for extra adapters across laptops, desktops, and tablets. It delivers maximum transfer rates up to 540MB/s read and 480MB/s write. This drive suits you if you need compact, plug-and-play storage to move large files across multiple devices quickly.
Pros
- Dual USB Type-A and USB Type-C connectors
- Transfer rates reaching up to 540MB/s read and 480MB/s write
- Protective metal casing measuring 3.35 inches in length
- Built using 3D NAND storage technology
Cons
- Write speed reaches a maximum of 480MB/s
- No activity indicator LED listed in specs
Good fit if
- You need direct plug-in compatibility with both USB Type-A and Type-C ports.
- You want an external drive built with a metal casing for portability.
- You work with files across laptops, desktops, and mobile devices.
Skip if
- You require an internal M.2 NVMe or 2.5-inch SATA drive.
- You need write speeds higher than 480MB/s for your workflow.
Verdict: KingSpec MemoStone 512GB Dual USB External SSD provides convenient dual-interface connectivity with both Type-A and Type-C connectors in a solid metal shell. It is a practical external option if your daily work requires swapping data across varied devices at speeds up to 540MB/s.
TEAMGROUP GX2 512GB SATA III 2.5-Inch SSD
Best for: internal 2.5-inch SATA PC and laptop upgrades
- Storage Capacity
- 512GB
- Interface
- SATA III 6Gb/s
- Form Factor
- 2.5 Inch
- Max Read Speed
- 530 MB/s
- Max Write Speed
- 430 MB/s
- Compatibility
- Laptop, Desktop
View on Amazon: TEAMGROUP GX2 512GB SATA III 2.5-Inch SSD Affiliate link
The TEAMGROUP GX2 is an internal 2.5-inch SATA III solid-state drive built with 3D NAND TLC flash. It offers 512GB of storage capacity with sequential read speeds up to 530 MB/s and write speeds up to 430 MB/s. If you want a dedicated drive for an internal laptop or desktop bay rather than an external USB drive, this unit gives you TRIM support, DevSleep power saving, and a standard SATA connection.
Pros
- Sequential read speeds reach up to 530 MB/s
- DevSleep support reduces power usage in system standby
- Built-in TRIM, ECC, wear-leveling, and S.M.A.R.T. monitoring
- Standard 0.28-inch (7mm) 2.5-inch form factor fits laptops and desktops
Cons
- Requires an internal SATA connection rather than direct USB connectivity
- Write speed is limited to 430 MB/s
Good fit if
- You need an internal 2.5-inch SATA drive for a desktop or laptop bay.
- You want DevSleep power-saving technology to lower standby battery draw.
- You require 512GB of TLC NAND storage with hardware wear-leveling.
Skip if
- You need an external portable drive with built-in USB plugs.
- You want faster throughput than the SATA III 6Gb/s interface provides.
Verdict: TEAMGROUP GX2 512GB 2.5-Inch SATA SSD delivers steady SATA III speeds and DevSleep efficiency for standard drive bays. It functions as a solid internal storage option if your system accommodates 2.5-inch SATA hardware.
TEAMGROUP MP33 512GB PCIe 3.0 M.2 SSD
Best for: internal desktop or laptop M.2 storage upgrades
- Storage Capacity
- 512GB
- Interface
- PCIe Gen3x4
- Max Read Speed
- 1700 MB/s
- Max Write Speed
- 1400 MB/s
- Cache Type
- SLC Cache
- Form Factor
- M.2 2280
View on Amazon: TEAMGROUP MP33 512GB PCIe 3.0 M.2 SSD Affiliate link
The TEAMGROUP MP33 512GB NVMe M.2 SSD is an internal solid-state drive built for desktop and laptop computers. It connects through a PCIe Gen3x4 interface, offering read speeds up to 1700 MB/s and write speeds up to 1400 MB/s. With 3D TLC NAND flash and SLC caching, this drive suits you if you need a high-speed internal drive with a 5-year limited warranty rather than an external USB drive.
Pros
- Read speeds up to 1700 MB/s and write speeds up to 1400 MB/s
- PCIe Gen3x4 interface with SLC caching technology
- 5-year or TBW limited warranty coverage
Cons
- Requires an M.2 2280 slot inside a desktop or laptop
- Not a plug-and-play external USB drive
Good fit if
- You want an internal PCIe Gen3x4 M.2 2280 SSD for a compatible PC or laptop.
- You need read speeds up to 1700 MB/s supported by SLC caching.
- You want 5-year or TBW limited warranty support.
Skip if
- You need an external portable SSD that connects via USB Type-A or Type-C.
- You have a system without an M.2 2280 PCIe-compatible slot.
Verdict: TEAMGROUP MP33 512GB NVMe M.2 SSD provides sequential read speeds up to 1700 MB/s and 3D TLC storage for desktop and laptop motherboards. It delivers reliable PCIe Gen3x4 internal performance backed by a 5-year limited warranty.
Timetec 512GB PCIe 3.0 M.2 SSD
Best for: Internal desktop or laptop M.2 storage upgrades
- Storage Capacity
- 512GB
- Interface
- NVMe PCIe Gen3x4
- Form Factor
- M.2 2280
- Max Read Speed
- Up to 2,000MB/s
- Max Write Speed
- Up to 1,600MB/s
- Cache Type
- SLC Cache
View on Amazon: Timetec 512GB PCIe 3.0 M.2 SSD Affiliate link
The Timetec 512GB M.2 PCIe Gen3x4 NVMe SSD is an internal solid-state drive built for compatible laptops and desktops. Unlike portable external drives, this unit installs directly into an M.2 2280 slot via PCIe Gen3x4. It delivers sequential read speeds up to 2,000MB/s and write speeds up to 1,600MB/s. It suits you if you need responsive internal capacity for daily computing tasks.
Pros
- Sequential read speeds up to 2,000MB/s and writes up to 1,600MB/s
- 1,500,000 hours MTBF reliability rating
- SLC cache technology with 3D NAND
- Five-year limited warranty coverage
Cons
- Mounting screws, brackets, and cables are not included
- Requires an internal M.2 2280 slot instead of external USB connectivity
Good fit if
- You need an internal M.2 2280 NVMe drive for your desktop or laptop.
- You want read speeds up to 2,000MB/s backed by a five-year warranty.
Skip if
- You need an external portable drive that connects via standard USB cables.
- You lack the mounting screw required to install an internal M.2 drive.
Verdict: Timetec 512GB M.2 PCIe Gen3x4 NVMe SSD provides reliable internal storage with sequential read speeds reaching up to 2,000MB/s. It serves as a dependable upgrade for compatible laptops and desktops with open M.2 2280 slots.
Fanxiang 512GB 2.5-Inch SATA SSD
Best for: internal 2.5-inch SATA laptop and desktop upgrades
- Storage Capacity
- 512GB
- Interface
- SATA III 6Gb/s
- Form Factor
- 2.5"
- Max Read Speed
- 500 MB/s
- Max Write Speed
- 500 MB/s
- Compatibility
- Laptop, Desktop
View on Amazon: Fanxiang 512GB 2.5-Inch SATA SSD Affiliate link
The Fanxiang 512GB 2.5-Inch SATA SSD is an internal solid-state drive designed for desktop and laptop upgrades. It uses a SATA III 6Gb/s interface and 3D NAND TLC flash memory to deliver sequential read and write speeds up to 500 MB/s. At 0.28 inches thick, it fits standard drive bays across Windows, Linux, and Mac systems. This drive suits you if you need reliable internal storage for standard 2.5-inch bays.
Pros
- Sequential read and write speeds reach up to 500 MB/s
- Uses 3D NAND TLC chips for write durability
- Slim 0.28-inch profile fits standard 2.5-inch bays
- Includes a 3-year warranty
Cons
- SATA III interface limits maximum speeds to 500 MB/s
- Requires internal mounting rather than portable USB connectivity
Good fit if
- You need an internal drive for a laptop, desktop, or all-in-one PC
- You want 3D NAND TLC flash for standard daily storage tasks
- You use Windows, Linux, or Mac OS on hardware with SATA connections
Skip if
- You want a plug-and-play external USB flash drive
- You have an M.2 slot and want faster NVMe PCIe speeds
Verdict: Fanxiang 512GB 2.5-Inch SATA SSD provides consistent 500 MB/s read and write performance using 3D NAND TLC memory for internal PC upgrades. It is a solid pick if you need a standard 2.5-inch drive rather than a portable external stick.
Fanxiang 512GB PCIe 3.0 NVMe SSD
Best for: internal desktop and laptop M.2 storage upgrades
- Storage Capacity
- 512GB
- Interface
- PCIe Gen3x4
- Max Read Speed
- 2,150 MB/s
- Max Write Speed
- 1,600 MB/s
- Form Factor
- M.2 2280
- Compatibility
- Laptop, Desktop
View on Amazon: Fanxiang 512GB PCIe 3.0 NVMe SSD Affiliate link
The Fanxiang S501 is an internal M.2 2280 NVMe SSD designed for desktop and laptop upgrades rather than portable USB use. It connects via a PCIe Gen3x4 interface, delivering sequential read speeds up to 2,150 MB/s and sequential write speeds up to 1,600 MB/s. Built with 3D NAND and LDPC ECC error correction, it suits you if you need faster internal storage for Windows systems instead of an external flash drive.
Pros
- Sequential read speeds up to 2,150 MB/s and write speeds up to 1,600 MB/s
- PCIe Gen3x4 interface delivers five times the transfer rate of SATA III
- Built-in LDPC ECC error correction for data integrity
- Standard M.2 2280 form factor fits compatible laptops and desktop motherboards
Cons
- Not compatible with PlayStation 5 consoles
- Requires an internal M.2 slot rather than portable USB connectivity
- Maximum throughput is limited compared to PCIe Gen4 drives
Good fit if
- You want an internal PCIe Gen3x4 upgrade for an M.2-equipped laptop or desktop.
- You run Windows 8, 10, or 11 and want speeds exceeding standard SATA drives.
- You need 512GB of internal storage with built-in hardware error correction.
Skip if
- You need a plug-and-play external USB drive for portable file sharing.
- You plan to expand storage for a PS5 console.
- You require the higher transfer bandwidth of a PCIe Gen4 solid state drive.
Verdict: Fanxiang S501 512GB NVMe SSD is an internal PCIe Gen3x4 drive that delivers up to 2,150 MB/s read speeds for desktop and laptop systems. It replaces external USB convenience with direct M.2 motherboard performance, though it does not support the PS5.
Fanxiang S500 Pro 512GB NVMe SSD
Best for: internal desktop and laptop M.2 storage upgrades
- Storage Capacity
- 512GB
- Interface
- PCIe Gen3x4
- Max Read Speed
- 3200MB/s
- Max Write Speed
- 1300MB/s
- Cache Type
- SLC Cache
- Cooling
- Graphite heat dissipation stickers
View on Amazon: Fanxiang S500 Pro 512GB NVMe SSD Affiliate link
This internal M.2 2280 solid-state drive gives you 512GB of storage over a PCIe Gen3x4 interface. It uses 3D NAND TLC flash with an SLC cache, reaching read speeds up to 3200MB/s and write speeds up to 1300MB/s. Built-in graphite heat stickers manage operating temperatures, and endurance reaches 320TBW. It suits you if you want high-speed internal desktop or laptop storage instead of an external portable drive.
Pros
- Up to 3200MB/s read speeds via PCIe Gen3x4
- Rated endurance up to 320TBW
- Includes graphite heat dissipation sticker
- Ships with mounting screws and screwdriver
Cons
- Write speeds top out at 1300MB/s
- Internal M.2 2280 form factor requires an open motherboard slot
Good fit if
- You need internal M.2 NVMe storage rather than a plug-and-play USB external drive.
- You want sequential read speeds up to 3200MB/s for desktop or laptop workloads.
- You value included installation hardware like screws and a screwdriver.
Skip if
- You want an external plug-and-play USB drive for moving files between multiple machines.
- You need write speeds faster than 1300MB/s.
Verdict: Fanxiang 512GB PCIe 3.0 M.2 SSD offers 3200MB/s read speeds, 320TBW endurance, and bundled installation tools for compatible motherboards. It provides a fast internal storage option if your system has an available M.2 slot.
Specifications side by side
| Spec | KingSpec MemoStone 512GB Dual USB External SSD | TEAMGROUP GX2 512GB SATA III 2.5-Inch SSD | TEAMGROUP MP33 512GB PCIe 3.0 M.2 SSD | Timetec 512GB PCIe 3.0 M.2 SSD | Fanxiang 512GB 2.5-Inch SATA SSD | Fanxiang 512GB PCIe 3.0 NVMe SSD | Fanxiang S500 Pro 512GB NVMe SSD |
|---|---|---|---|---|---|---|---|
| Storage Capacity | 512GB | 512GB | 512GB | 512GB | 512GB | 512GB | 512GB |
| Interface | USB 3.2 Gen2 | SATA III 6Gb/s | PCIe Gen3x4 | NVMe PCIe Gen3x4 | SATA III 6Gb/s | PCIe Gen3x4 | PCIe Gen3x4 |
| Form Factor | not specified | 2.5 Inch | not specified | M.2 2280 | 2.5" | not specified | not specified |
| Max Read Speed | 540MB/s | 530 MB/s | 1700 MB/s | Up to 2,000MB/s | 500 MB/s | 2,150 MB/s | 3200MB/s |
| Max Write Speed | 480MB/s | 430 MB/s | 1400 MB/s | Up to 1,600MB/s | 500 MB/s | 1,600 MB/s | 1300MB/s |
| Cache Type | not specified | not specified | SLC Cache | SLC Cache | not specified | not specified | SLC Cache |
| Cooling | not specified | not specified | not specified | not specified | not specified | not specified | Graphite heat dissipation stickers |
| Compatibility | Laptop, Desktop | Laptop, Desktop | Laptop, Desktop | Laptop, Desktop | Laptop, Desktop | Laptop, Desktop | Laptop, Desktop |
| NAND Type | not specified | 3D NAND, TLC | 3D NAND, TLC | 3D NAND | not specified | not specified | 3D NAND, TLC |
| Size | 512GB | 512GB | 512GB | 512GB | 512GB | 512GB | 512GB |
| Dimensions | 3.35 × 0.85 × 0.31 inches | 3.94 × 2.75 × 0.28 inches | 3.15 × 0.87 × 0.15 inches | not specified | 3.94 × 2.72 × 0.28 inches | 3.14 × 0.86 × 0.14 inches | 3.15 × 0.87 × 0.08 inches |
| Weight | not specified | 1.76 ounces | 0.32 ounces | 0.63 ounces | 2.08 ounces | not specified | 0.96 ounces |
| Color | Gray | GX2 | not specified | PCIe Gen3 | black | 512gb | black |
| Model | US4-512 | 11807010 | TM8FP6512G0C101 | MK03-512GB-M2 | S101 | S501-512Go | S500 Pro |
If you prefer a complete system over external storage, the best mini PCs with 512GB SSD feature comparable drive capacity.
Frequently asked questions
Can you use an internal M.2 NVMe SSD as an external drive like the KingSpec MemoStone?
You can use an internal M.2 NVMe SSD externally if you install it into a compatible USB enclosure. Drives like the Timetec 512GB or Fanxiang S500 Pro feature standard M.2 2280 form factors designed for internal motherboard slots. Unlike the KingSpec MemoStone, which connects directly via integrated Type-A and Type-C plugs, an internal drive requires this third-party enclosure hardware to function across your devices.
What is the main speed difference between the KingSpec MemoStone and internal PCIe 3.0 SSDs?
Internal PCIe 3.0 SSDs provide significantly higher sequential read speeds than the KingSpec MemoStone. The KingSpec MemoStone tops out at 540MB/s over USB. In comparison, internal M.2 drives offer much faster transfers. The TEAMGROUP MP33 delivers up to 1700 MB/s, the Timetec 512GB reaches 2,000MB/s, and the Fanxiang S500 Pro achieves up to 3200MB/s directly through motherboard PCIe channels.
How do 2.5-inch SATA SSDs compare to the KingSpec MemoStone in transfer performance?
Internal 2.5-inch SATA SSDs match the KingSpec MemoStone closely in overall transfer speeds. Both designs are limited by standard SATA transfer caps. The KingSpec MemoStone operates at up to 540MB/s, while the Fanxiang 512GB SATA SSD reaches 500 MB/s read and write speeds. Choosing between them depends on whether you require an internal drive for a PC bay or a portable dual-port drive for daily carry.
Can the Fanxiang S501 512GB NVMe SSD work in a PlayStation 5 console?
The Fanxiang S501 512GB NVMe SSD does not support the PS5 console. The manufacturer specifications state that this PCIe 3.0 M.2 2280 drive is strictly for laptop and desktop installations. In addition, its maximum read speed reaches up to 2,150 MB/s, which falls below the performance requirements needed for PlayStation 5 internal expansion. You should only install this drive inside compatible personal computers.
What NAND flash memory types are used in these 512GB alternative drives?
Most internal alternatives in this guide use 3D NAND flash memory, with several explicitly specifying TLC technology. The TEAMGROUP GX2, TEAMGROUP MP33, Fanxiang S101, and Fanxiang S500 Pro all utilize 3D NAND TLC architecture. The Timetec 512GB also lists 3D NAND. These flash configurations store data reliably across solid-state cells, providing consistent endurance ratings like the 320TBW specified for the Fanxiang S500 Pro.
Which alternatives include SLC caching technology for write performance?
Several PCIe 3.0 M.2 alternatives in this lineup feature an SLC cache to help maintain responsive data writing. The TEAMGROUP MP33, Timetec 512GB, and Fanxiang S500 Pro all list SLC caching in their technical specifications. An SLC cache allocates a portion of the TLC NAND to function in single-level cell mode, accelerating temporary burst writes before committing files into the standard storage blocks.
How does drive size and form factor differ between the MemoStone and internal SSDs?
The KingSpec MemoStone measures 3.35 by 0.85 by 0.31 inches as a compact pocket drive. Internal 2.5-inch SATA drives like the TEAMGROUP GX2 measure approximately 3.94 by 2.75 inches to fit standard drive bays. Meanwhile, M.2 2280 NVMe SSDs such as the TEAMGROUP MP33 and Fanxiang S500 Pro measure roughly 3.15 by 0.87 inches, mounting flat onto motherboard sockets to save internal space.