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Silver metal dual USB-C and USB-A flash drive with rotating cover

SanDisk

SanDisk SDDDC4 256GB USB 3.1 Type-C/Type-A Dual-Port USB Flash Drive

SKU CH-ACEQ-3ZC3A MPN SDDDC4

A 256 GB dual-port flash drive with USB Type-C and Type-A connectors, up to 150 MB/s read speed, and a rotatable metal shell

  • Capacity256GB

Capacity 256GB

  • Dual USB-C and USB-A ports let you move files between phones, tablets and computers
  • Up to 150MB/s read speed transfers large photos and videos quickly
  • 256GB capacity frees space on your mobile device for more apps and media
  • SanDisk Memory Zone app backs up contacts, photos and documents automatically
  • Rotatable metal shell protects both connectors and includes a keyring loop

256 GB dual-port USB flash drive

The SanDisk SDDDC4 provides 256 GB of storage in a metal-cased drive with both USB Type-C and Type-A connectors. It lets users move files directly between USB-C smartphones, tablets, Macs and USB-A computers without adapters. The rotatable design protects both ports when the drive is carried on a keyring.

Sustained transfer behaviour

The drive is rated for up to 150 MB/s read speed under the USB 3.1 Gen 1 interface. Actual throughput will vary with file size, host controller performance and thermal conditions during extended copies. No write-speed figure is published, so sustained write performance cannot be characterised from the supplied data.

USB 3.1 Gen 1 practical limits

The USB 3.1 Gen 1 interface caps theoretical bandwidth at 5 Gbps, so real-world speeds remain well below the 150 MB/s headline figure when multiple devices share the bus. The drive operates within a 0–35 °C temperature range, and performance may throttle if the metal enclosure exceeds that limit during prolonged use.

Helstu kostir

  • Dual USB-C and USB-A ports let you move files between phones, tablets and computers
  • Up to 150MB/s read speed transfers large photos and videos quickly
  • 256GB capacity frees space on your mobile device for more apps and media
  • SanDisk Memory Zone app backs up contacts, photos and documents automatically
  • Rotatable metal shell protects both connectors and includes a keyring loop

Tæknilýsing

Capacity256GB

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Does the 150MB/s read speed generate noticeable heat during long transfers?

The metal shell helps dissipate warmth, and the drive is rated for 0–35 °C operating temperature, so it stays within safe limits during extended use.

What devices must I already own to use both the Type-C and Type-A connectors?

You need a USB Type-C port (smartphone, tablet, or Mac) and a USB Type-A port (PC or laptop) to take full advantage of the dual-port design.

Will the USB 3.1 Gen 1 Type-C interface work with my older USB 2.0 Type-A ports?

Yes, the drive is backward-compatible with USB 2.0 Type-A ports, though transfer speeds will fall to the older port's maximum.

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