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Black rectangular USB-A flash drive with metal body and keyring hole

SanDisk

SanDisk Extreme PRO USB Flash Drive SDCZ820-256G-G46 256GB 1000MB/s 900MB/s Black

SKU CH-M547-96KM1

High-speed USB 3.2 Gen 2 flash drive with 256GB capacity and read speeds up to 1000MB/s

  • Total capacity256 GB
  • USB standardUSB 3.2 Gen 2
  • USB port typesType A
  • Max read speedUp to 1,000 MB/s
  • Write throughputUp to 900 MB/s
  • Product colorBlack

Capacity 256GB

  • Rapid read speeds up to 1000MB/s slash transfer time
  • Write speeds up to 900MB/s move large files fast
  • USB 3.2 Gen 2 interface delivers 200x USB 2.0 speed
  • 256GB capacity stores massive projects on the go
  • Premium metal body with keyring hole fits any bag

256 GB USB 3.2 Gen 2 flash drive

The SanDisk Extreme PRO SDCZ820-256G-G46 is a USB-A flash drive rated for sequential reads up to 1000 MB/s and writes up to 900 MB/s. It connects over USB 3.2 Gen 2 and offers 256 GB of capacity in a black metal housing with a keyring hole.

Professionals moving large media libraries

Creative workers who transfer multi-gigabyte video or photo batches between laptops and desktops will benefit from the high sustained throughput. Users who only shuffle small documents or need encrypted hardware security should look at something else.

256 GB capacity with 900 MB/s write headroom

The drive comfortably ingests raw photo bursts, 4K footage and full system images without bottlenecking a USB 3.2 Gen 2 port. It runs out when a project archive exceeds the 256 GB limit or when a workflow demands hardware encryption or ruggedised IP-rated protection.

How it compares

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

Price $73.99
Pricier than about 72% of the 1,099 comparable items (median $31.99).
Total capacity 256 GB
Higher than about 80% of the 746 comparable items (median 64 GB).
Price per TB $289.02 per TB
Pricier than about 61% of the 600 comparable items (median $226.48 per TB).

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Specifications

Product
Brand nameSanDisk
Product lineSanDisk Extreme PRO Flash Drive with USB-A
Model nameSDCZ820-256G-G46
Part numberSDCZ820-256G-G46
Total capacity256 GB
Product colorBlack
Performance
Max read speedUp to 1,000 MB/s
Write throughputUp to 900 MB/s
Ports & slots
USB standardUSB 3.2 Gen 2
USB port typesType A

Other versions of this model

5 more in the same range

Questions about this item

Does my computer need a USB 3.2 Gen 2 Type-A port to reach the 1000MB/s read and 900MB/s write speeds?

Yes, a USB 3.2 Gen 2 Type-A port is required for the advertised speeds; older ports will limit performance to their own maximum.

Will this drive work at reduced speed if I plug it into my older USB 2.0 ports?

It is backward compatible with USB 2.0 ports, but transfers will run at USB 2.0 speeds instead of the 1000MB/s read and 900MB/s write rates.

How can I verify the drive is delivering up to 1000MB/s read and 900MB/s write after setup?

Run a benchmark tool such as CrystalDiskMark on a USB 3.2 Gen 2 port; sequential results should approach the stated figures.

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