Sandisk 4TB Extreme Portable SSD
Today
Typical price$646
Amazon: the cheapest today among the stores checked
Buy on AmazonSandisk 4TB Extreme Portable SSD or Western Digital Internal SSD 4TB WD Black SN7100?
4TB Extreme Portable SSD costs $31 less today, across the stores checked.
Sandisk 4TB Extreme Portable SSD is $31 the cheaperWestern Digital Internal SSD 4TB WD Black SN7100 is the cheaper
The comparison in detail
Western Digital Internal SSD 4TB WD Black SN7100
Today
Typical price$677
Amazon: the cheapest today among the stores checked
Buy on AmazonAffiliate links: if you buy, the store pays us a commission at no cost to you.
Both prices over the last 30 days
First data point for one of the two: the chart appears as the days go by.
Still only a few days of data for both to read the trend; the chart fills in as the days go by.
Where is each one cheapest today?
Updated 06/11/2026
4TB Extreme Portable SSD
- Amazon Lowest price$646Buy on Amazon
Internal SSD 4TB WD Black SN7100
- Amazon Lowest price$677Buy on Amazon
Spec sheet side by side
| Item | 4TB Extreme Portable SSD | Internal SSD 4TB WD Black SN7100 |
|---|---|---|
| Specs | ||
| Type changes | External | NVMe |
| General | ||
| Model changes | 4TB Extreme Portable SSD | Internal SSD 4TB WD Black SN7100 |
Other comparisons
4TB Extreme Portable SSD orCrucial T705 PCIe Gen5 NVMe 4TB SSD$630Compare
Internal SSD 4TB WD Black SN7100 orSamsung Portable SSD P9 2TB$650Compare- 4TB Extreme Portable SSD orSamsung Portable SSD P9 2TB$650Compare
4TB Extreme Portable SSD orSeagate Expansion 24TB External Hard Drive HDD$680Compare- Internal SSD 4TB WD Black SN7100 orSeagate Expansion 24TB External Hard Drive HDD$680Compare
How we choose
Source: Catalog of partner stores, checked on 06/11/2026.
Lowest price seen for the product in the stores we read, on the day it was read, before sales tax. The model is the brand plus the name of the SSD; the versions go in the table. The price range, the median and the position use only models with a score; the price comparison looks at models whose score is within 0.5 points.
The spec score doesn’t measure real speed or durability or durability, and the strong or weak point reading is just a comparison of numbers, not a buying recommendation.