Pricing
CATALOG
Class average, best price per GB:
SATA
$0.138
→ Holding (+2.9% since last reported)
Gen 4
$0.184
→ Holding (0.0% since last reported)
Gen 5
$0.199
→ Holding (−2.5% since last reported)
Snapshot Nov 2, 2026
Filters
Sorting all capacities by $/GB favors larger drives. Pick a capacity to compare like with like.
Drive
Capacity
Best price
$/GB
vs Class
Trend
SanDisk Optimus 5100 NVMe PCIe Gen4 (64 Gbps)
PCIe Gen4 · M.2 2280
4TB
$599
at SanDisk Direct.
Lowest tracked price
$0.150
/GB
19% below the average best Gen 4 price ($0.184/GB)
SanDisk 520 SATA III (6 Gbps)
SATA · 2.5-inch
4TB
$719
at SanDisk Direct.
Lowest tracked price
$0.180
/GB
30% above the average best SATA price ($0.138/GB)
4TB
$799
/
$999
20% OFF
at SanDisk Direct.
Lowest tracked price
$0.200
/GB
SanDisk Optimus GX 7100 NVMe PCIe Gen4 (64 Gbps)
PCIe Gen4 · M.2 2280
4TB
$799
/
$1,501
47% OFF
at SanDisk Direct.
Lowest tracked price
$0.200
/GB
9% above the average best Gen 4 price ($0.184/GB)
Down 8% vs last cycle
SanDisk Optimus GX PRO 850X NVMe PCIe Gen4 (64 Gbps)
PCIe Gen4 · M.2 2280
4TB
$849
/
$1,874
55% OFF
at SanDisk Direct.
Lowest tracked price
$0.212
/GB
15% above the average best Gen 4 price ($0.184/GB)
Down 15% vs last cycle
SanDisk Optimus GX 7100X NVMe PCIe Gen4 (64 Gbps)
PCIe Gen4 · M.2 2280
4TB
$899
at SanDisk Direct.
Lowest tracked price
$0.225
/GB
22% above the average best Gen 4 price ($0.184/GB)
Down 6% vs last cycle
SanDisk Optimus GX PRO 8100 NVMe PCIe Gen5 (128 Gbps)
PCIe Gen5 · M.2 2280
4TB
$949
/
$1,974
52% OFF
at SanDisk Direct.
Lowest in ~20 days ($939)
$0.237
/GB
19% above the average best Gen 5 price ($0.199/GB)
Down 12% vs last cycle
4TB
$1,059
at SanDisk Direct.
Lowest tracked price
$0.265
/GB
44% above the average best Gen 4 price ($0.184/GB)
Down 7% vs last cycle
8 of 8
About the Scores
Every drive in our catalog meets a minimum performance bar; drives below it aren't listed. The score answers one question: how much of its interface's potential does this drive actually deliver? It's based on published read and write speeds, whether smaller capacities keep the same write speed, and whether the drive has a DRAM cache, each measured against the best drive on the same interface. Because scores are relative to the interface, a Gen3 drive and a Gen5 drive can both score near 10 even though the Gen5 drive is much faster. To compare like with like, filter by interface class.