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Silver aluminium rectangular portable drive with short USB-C cable

Rocstor

Rocstor B153E5-01 RocPort 4U 120GB 2.5" USB 2.0 portable hard drive

SKU CH-PS1H-SK98E MPN B153E5-01

A 120 GB portable 2.5" USB 2.0 hard drive with an aluminum enclosure for silent, fanless operation and cross-platform plug-and-play use

  • Total capacity120 GB
  • Interface typeUSB 2.0
  • Form factor2.5 in (6.35 cm)
  • Rotational speed5,400 RPM
  • Cache memory8 MB
  • Product typeExternal
  • 120 GB capacity stores large files and backups
  • USB 2.0 plug-and-play works instantly on PC and Mac
  • 5400 RPM drive with 8 MB cache delivers steady data access
  • Aluminium enclosure dissipates heat silently without a fan
  • Light 5-ounce design fits easily in a bag

What this drive does

The Rocstor RocPort 4U is a portable 2.5" external hard drive with 120GB capacity and a 5400 RPM mechanism. It connects through a single USB 2.0 cable and requires no external power supply or driver installation. The aluminium enclosure acts as a passive heatsink, so the unit runs without a fan. It is suited to users who need a compact, bus-powered volume for moving documents, backups or media between computers.

Check your ports and cable

The supplied cable is 3.28 ft long and terminates in USB Type-C plugs on both ends. Your host must provide a USB Type-C port that supports USB 2.0 data signalling; a USB-C port that carries only power will not work. No separate driver is needed for Windows, macOS, Chrome OS, Android or iPadOS, but the host operating system must be able to mount a standard mass-storage device formatted with a filesystem it recognises.

Heat, noise and power in use

Because the aluminium case dissipates heat passively, the drive produces no fan noise during normal operation. Power is drawn entirely from the host USB port, so the load on that port equals the drive's own consumption. The 5400 RPM spindle and 8MB cache yield a practical transfer rate of up to 60 MB/s, which is the ceiling set by the USB 2.0 interface rather than the mechanism itself.

How it compares

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

Price $67.99
Cheaper than about 64% of the 365 comparable items (median $108.99).
Total capacity 120 GB
Lower than about 99% of the 239 comparable items (median 2 TB).
Price per TB $566.58 per TB
Pricier than about 96% of the 239 comparable items (median $51.50 per TB).

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Specifications

Product
Brand nameRocstor
Product lineRocPort 4U
Model nameB153E5-01
Total capacity120 GB
Product typeExternal
Performance
Rotational speed5,400 RPM
Storage
Cache memory8 MB
Ports & slots
Interface typeUSB 2.0
Size & build
Form factor2.5 in (6.35 cm)
Shipping weight0.91 kg
Package size203 × 152 × 51 mm

Questions about this item

Does the B153E5-01 include the USB 2.0 cable or do I need to buy one separately?

The drive comes with a 3.28 ft USB 2.0 Type C male-to-male cable so no separate cable purchase is required.

The listing shows only one capacity — is the 120GB 5400 RPM model the only option?

Yes, the RocPort 4U series is offered in this single 120GB 5400 RPM configuration with 8MB cache.

What real-world transfer speed can I expect from the 60 MB/s headline figure on a laptop?

The 60 MB/s rating is the interface maximum; actual throughput will be lower and depends on file sizes and the host system.

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