Compare Solid State Drives

Compare Western Digital WD_BLACK SN850P 4TB vs SANDISK Optimus GX 7100M 2TB

Western Digital WD_BLACK SN850P 4TB and SANDISK Optimus GX 7100M 2TB are both solid state drives with the same Interface (PCIe Gen4 x4). The main differences are in Capacity and Form Factor.

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Western Digital WD_BLACK SN850P 4TB

SANDISK Optimus GX 7100M 2TB

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Last updated 32 minutes ago.

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Brand

Western Digital

Brand

SanDisk

Model

WDBBYV0040BNC-WRSN

Model

SDSP71200TAT-000E0
SDSP71200TAT

Release Date

📅 June 2023

Release Date

📅 February 2026

* First availability for purchase, it may not correspond to the actual market launch date.

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Price/GB

$0.08

Price/GB

$0.30

GB/$1

12.9

GB/$1

3.33

Series

WD_BLACK SN850

Series

-

Capacity

4000 GB

Capacity

2000 GB

Interface

PCIe Gen4 x4

Interface

PCIe Gen4 x4

NVME

Yes

NVME

Yes

Form Factor

M.2-2280

Form Factor

M.2-2230

SSD Controller

Western Digital

SSD Controller

-

Max Sequential Read

Up to 7300 MB/s

Max Sequential Read

-

Max Sequential Write

Up to 6600 MB/s

Max Sequential Write

-

MTBF

1.75M Hours

MTBF

-

Options (4)

	2TB NEW - Up to 7,300MB/s $299.99
	1TB Up to 7,000 MB/s $249.99
	2TB Up to 7,000 MB/s $379.99
	1TB NEW - Up to 7,300MB/s $245.73

Options (1)

SANDISK Optimus GX 7100M 1TB

1TB
$299.99

Comparison and key differences summary

Reasons to buy the Western Digital WD_BLACK SN850P 4TB:

More Capacity (+2000 GB available)

Reasons to buy the SANDISK Optimus GX 7100M 2TB:

Newer Product, it was released around 3 years later

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