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Battery-shaped yellow portable SSD with RGB top light and zinc alloy casing

MemoStone

MemoStone ZS301-256 256GB portable SSD, Yellow

SKU CH-5WEX-BPRWD

A pocket-sized 256 GB portable SSD with USB 3.2 Gen 2x2 speeds up to 1900 MB/s read and 1700 MB/s write, zinc-alloy cooling, RGB lighting and a built-in cable loop

  • Total capacity256 GB
  • Sequential read speedUp to 1,900 MB/s
  • Sequential write speedUp to 1,700 MB/s
  • Interface typeUSB 3.2 Gen 2 × 2
  • NAND flash type3D NAND
  • Random read (4K)Up to 32,000 IOPS

Capacity 256GB

  • Up to 1900 MB/s sequential read via USB 3.2 Gen 2x2
  • Up to 1700 MB/s sequential write for fast file saves
  • 250 TBW endurance rating with 1,000,000-hour MTBF
  • Zinc alloy casing dissipates heat during sustained transfers
  • Compact battery-inspired design with RGB lighting and cable loop

256 GB portable SSD for fast external storage

The MemoStone ZS301-256 provides 256 GB of 3D NAND flash in a compact yellow enclosure. It connects via USB 3.2 Gen 2x2 Type-C and delivers up to 1900 MB/s read and 1700 MB/s write speeds. The drive suits users who need quick file transfers and backups across Windows, Mac and Android devices.

Zinc alloy body with RGB light and cable loop

A zinc alloy casing acts as a heatsink to maintain stable performance during heavy workloads. The battery-inspired shape includes a built-in loop that secures the cable for travel. An RGB top light adds visual flair while the drive draws 2.6 W active and 0.5 W idle power.

USB 3.2 Gen 2x2 limits and compatibility notes

The 20 Gbps interface requires a host port that supports USB 3.2 Gen 2x2 to reach rated speeds; performance drops on slower ports or MacBook connections. The drive is not recommended for iPhone-related products. Endurance is rated at 250 TBW with a 1,000,000-hour MTBF across 0 °C to 70 °C operating temperatures.

How it compares

Measured against everything we stock in Portable USB SSDs, at today’s prices. Recalculated every night.

Price $28.99
Cheaper than about 97% of the 410 comparable items (median $202.99).
Total capacity 256 GB
Lower than about 95% of the 311 comparable items (median 1 TB).
Sequential read speed Up to 1,900 MB/s
Higher than about 69% of the 166 comparable items (median 1,050 MB/s).
Price per TB $113.24 per TB
Cheaper than about 68% of the 310 comparable items (median $142.00 per TB).

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Specifications

Product
Brand nameMemostone
Product lineZS301
Model nameZS301-256
Part numberZS301-256
Total capacity256 GB
Product colorYellow
Performance
Sequential read speedUp to 1,900 MB/s
Sequential write speedUp to 1,700 MB/s
Random read (4K)Up to 32,000 IOPS
Random write (4K)Up to 210,000 IOPS
Storage
NAND flash type3D NAND
Write endurance250 TB
Ports & slots
Interface typeUSB 3.2 Gen 2 × 2
Power
Idle power draw0.5 W
Active power draw2.6 W
Size & build
Overall width65.47 mm
Product weight100g
Environment & compliance
Operating temperature range0 °C to 70 °C
Storage temperature range-20 °C to 75 °C
Operating humidity range5-95%
More details
Mean time between failures1,000,000 h

Other versions of this model

3 more in the same range

Questions about this item

What does the USB 3.2 Gen 2x2 interface cap the drive at in practice?

The USB 3.2 Gen 2x2 interface enables up to 1900 MB/s sequential read and 1700 MB/s sequential write, with 32000 IOPS random read and 210000 IOPS random write.

What physical features let the ZS301-256 fit in a bag or mount to a loop?

The drive uses a compact battery-inspired zinc alloy body with a built-in cable loop for secure carry and heat dissipation during transfers.

How is the drive installed, and what step do people miss on Mac?

Connect the Type-C cable for plug-and-play operation on Windows, Android or Mac; on Mac the speed may drop below the rated 1900 MB/s.

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