The KingSpec MomeStone 512GB Portable SSD up to 2000MB/s, Thumb Drive 20Gbps USB 3.2 Gen 2, Type-C USSD Mobile Solid U Disk USB Flash External Solid... costs $0.0840/GB while the Western Digital WD_BLACK SN770 M.2 2280 250GB PCIe Gen4 16GT/s, up to 4 Lanes Internal Solid State Drive (SSD) WDS250G3X0E costs $0.3390/GB. KingSpec MomeStone 512GB Portable SSD up to 2000MB/s, Thumb Drive 20Gbps USB 3.2 Gen 2, Type-C USSD Mobile Solid U Disk USB Flash External Solid... offers 75% better value per gigabyte as of June 2026. Both products are available on BuyPerUnit with prices from Amazon, Best Buy, and Newegg.
KingSpec MomeStone 512GB Portable SSD up to 2000MB/s, Thumb Drive 20Gbps USB 3.2 Gen 2, Type-C USSD Mobile Solid U Disk USB Flash External Solid... vs Western Digital WD_BLACK SN770 M.2 2280 250GB PCIe Gen4 16GT/s, up to 4 Lanes Internal Solid State Drive (SSD) WDS250G3X0E — Which Is Better Value?
Specification Comparison
| Spec | KingSpec MomeStone 512GB Portable SSD up to 2000MB/s, Thumb Drive 20Gbps USB 3.2 Gen 2, Type-C USSD Mobile Solid U Disk USB Flash External Solid... | Western Digital WD_BLACK SN770 M.2 2280 250GB PCIe Gen4 16GT/s, up to 4 Lanes Internal Solid State Drive (SSD) WDS250G3X0E |
|---|---|---|
| Brand | KingSpec | Western Digital |
| Capacity | 512GB | 250GB |
| $/GB | $0.0840 | $0.3390 |
| Price | $42.99 | $84.74 |
| Retailer | Newegg | Newegg |
| Category | SSDs & NVMe Drives | SSDs & NVMe Drives |
| Subcategory | ssd | nvme |
Price Across Retailers
KingSpec MomeStone 512GB Portable SSD up to 2000MB/s, Thumb Drive 20Gbps USB 3.2 Gen 2, Type-C USSD Mobile Solid U Disk USB Flash External Solid...
Western Digital WD_BLACK SN770 M.2 2280 250GB PCIe Gen4 16GT/s, up to 4 Lanes Internal Solid State Drive (SSD) WDS250G3X0E
Which Should You Buy?
Based on current pricing data, the KingSpec MomeStone 512GB Portable SSD up to 2000MB/s, Thumb Drive 20Gbps USB 3.2 Gen 2, Type-C USSD Mobile Solid U Disk USB Flash External Solid... offers better value at $0.0840//GB compared to the Western Digital WD_BLACK SN770 M.2 2280 250GB PCIe Gen4 16GT/s, up to 4 Lanes Internal Solid State Drive (SSD) WDS250G3X0E at $0.3390//GB — that's roughly 75% less per gigabyte.
The best deal for the KingSpec MomeStone 512GB Portable SSD up to 2000MB/s, Thumb Drive 20Gbps USB 3.2 Gen 2, Type-C USSD Mobile Solid U Disk USB Flash External Solid... is $42.99 at Newegg, while the Western Digital WD_BLACK SN770 M.2 2280 250GB PCIe Gen4 16GT/s, up to 4 Lanes Internal Solid State Drive (SSD) WDS250G3X0E starts at $84.74 at Newegg.
However, price per gigabyte isn't everything — consider factors like warranty, performance specs, brand reliability, and your specific capacity needs. Check each KingSpec MomeStone 512GB Portable SSD up to 2000MB/s, Thumb Drive 20Gbps USB 3.2 Gen 2, Type-C USSD Mobile Solid U Disk USB Flash External Solid... and Western Digital WD_BLACK SN770 M.2 2280 250GB PCIe Gen4 16GT/s, up to 4 Lanes Internal Solid State Drive (SSD) WDS250G3X0E product page for detailed specifications and price history.
Frequently Asked Questions
Is KingSpec MomeStone 512GB Portable SSD up to 2000MB/s, Thumb Drive 20Gbps USB 3.2 Gen 2, Type-C USSD Mobile Solid U Disk USB Flash External Solid... or Western Digital WD_BLACK SN770 M.2 2280 250GB PCIe Gen4 16GT/s, up to 4 Lanes Internal Solid State Drive (SSD) WDS250G3X0E a better deal?
As of June 2026, KingSpec MomeStone 512GB Portable SSD up to 2000MB/s, Thumb Drive 20Gbps USB 3.2 Gen 2, Type-C USSD Mobile Solid U Disk USB Flash External Solid... offers better value at $0.0840//GB compared to Western Digital WD_BLACK SN770 M.2 2280 250GB PCIe Gen4 16GT/s, up to 4 Lanes Internal Solid State Drive (SSD) WDS250G3X0E at $0.3390//GB. That is approximately 75% better value per gigabyte.
What is the price per GB of KingSpec MomeStone 512GB Portable SSD up to 2000MB/s, Thumb Drive 20Gbps USB 3.2 Gen 2, Type-C USSD Mobile Solid U Disk USB Flash External Solid...?
The KingSpec MomeStone 512GB Portable SSD up to 2000MB/s, Thumb Drive 20Gbps USB 3.2 Gen 2, Type-C USSD Mobile Solid U Disk USB Flash External Solid... is currently priced at $0.0840/GB ($42.99 for 512GB) at Newegg.
Where can I buy Western Digital WD_BLACK SN770 M.2 2280 250GB PCIe Gen4 16GT/s, up to 4 Lanes Internal Solid State Drive (SSD) WDS250G3X0E for the cheapest price?
The cheapest price for the Western Digital WD_BLACK SN770 M.2 2280 250GB PCIe Gen4 16GT/s, up to 4 Lanes Internal Solid State Drive (SSD) WDS250G3X0E is $84.74 at Newegg, which works out to $0.3390/GB.