Western Digital WD_BLACK SN8100 4TB Heatsink vs SANDISK Optimus GX 7100M 2TB SSD Comparison

Western Digital WD_BLACK SN8100 4TB Heatsink and SANDISK Optimus GX 7100M 2TB are both solid state drives with the same MTBF (1,750,000 Hours). The main differences are in Capacity, Interface, Form Factor and Max Sequential Read.

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Western Digital WD_BLACK SN8100 4TB Heatsink	SANDISK Optimus GX 7100M 2TB
Prices (Change region) In Stock Free shipping $899.99 (~~$999.99~~) $100.00 off w/ promo code: SBVF643, ends 6/14 In Stock Free shipping $999.99 In Stock $999.99	Prices (Change region) In Stock Free shipping $599.99 In Stock Free shipping $599.99 In Stock $659.99 Last updated 30 minutes ago. In Stock Free shipping $816.16 Show 1 more offers
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Brand Western Digital	Brand SanDisk
Model WDS400T1XHM WDS400T1XHM-00CMT0	Model SDSP71200TAT-000E0 SDSP71200TAT
Release Date -	Release Date 📅 February 2026
* First availability for purchase, it may not correspond to the actual market launch date.
User reviews ★★★★☆ (23 reviews) Add a product review	User reviews Add a product review
Performance (Charts) 1st / 1746	Performance (Charts) n/a
Effective Value 96th / 336	Effective Value -
Price history View Details ►	Price history View Details ►
Price/GB $0.22	Price/GB $0.30
GB/$1 4.44	GB/$1 3.33
Series -	Series Optimus GX 7100M
Capacity 4000 GB	Capacity 2000 GB
Interface PCIe Gen5 x4	Interface PCIe Gen4 x4
NVME Yes	NVME Yes
Form Factor M.2-2280	Form Factor M.2-2230
NAND Flash Type -	NAND Flash Type 3D NAND TLC
Max Sequential Read Up to 14900 MB/s	Max Sequential Read Up to 7250 MB/s
Max Sequential Write Up to 14000 MB/s	Max Sequential Write Up to 6900 MB/s
MTBF 1,750,000 Hours	MTBF 1,750,000 hours