The SanDisk Professional PRO-G40 4TB Thunderbolt 3 Portable External SSD costs $0.2122/GB while the KingSpec P3 SSD 4TB Internal 2.5' Solid State Drive 2.5 Inch SATA III 3D NAND Flash Data Storage, Speed up to 520MB/s, laptop PC Desktop costs $0.0800/GB. KingSpec P3 SSD 4TB Internal 2.5' Solid State Drive 2.5 Inch SATA III 3D NAND Flash Data Storage, Speed up to 520MB/s, laptop PC Desktop offers 62% better value per gigabyte as of July 2026. Both products are available on BuyPerUnit with prices from Amazon, Best Buy, and Newegg.
SanDisk Professional PRO-G40 4TB Thunderbolt 3 Portable External SSD vs KingSpec P3 SSD 4TB Internal 2.5' Solid State Drive 2.5 Inch SATA III 3D NAND Flash Data Storage, Speed up to 520MB/s, laptop PC Desktop — Which Is Better Value?
Specification Comparison
| Spec | SanDisk Professional PRO-G40 4TB Thunderbolt 3 Portable External SSD | KingSpec P3 SSD 4TB Internal 2.5' Solid State Drive 2.5 Inch SATA III 3D NAND Flash Data Storage, Speed up to 520MB/s, laptop PC Desktop |
|---|---|---|
| Brand | SanDisk | KingSpec |
| Capacity | 4TB | 4TB |
| $/GB | $0.2122 | $0.0800 |
| Price | $849.00 | $319.99 |
| Retailer | Newegg | Newegg |
| Category | SSDs & NVMe Drives | SSDs & NVMe Drives |
| Subcategory | ssd | ssd |
Price Across Retailers
Which Should You Buy?
Based on current pricing data, the KingSpec P3 SSD 4TB Internal 2.5' Solid State Drive 2.5 Inch SATA III 3D NAND Flash Data Storage, Speed up to 520MB/s, laptop PC Desktop offers better value at $0.0800//GB compared to the SanDisk Professional PRO-G40 4TB Thunderbolt 3 Portable External SSD at $0.2122//GB — that's roughly 62% less per gigabyte.
The best deal for the KingSpec P3 SSD 4TB Internal 2.5' Solid State Drive 2.5 Inch SATA III 3D NAND Flash Data Storage, Speed up to 520MB/s, laptop PC Desktop is $319.99 at Newegg, while the SanDisk Professional PRO-G40 4TB Thunderbolt 3 Portable External SSD starts at $849.00 at Newegg.
However, price per gigabyte isn't everything — consider factors like warranty, performance specs, brand reliability, and your specific capacity needs. Check each SanDisk Professional PRO-G40 4TB Thunderbolt 3 Portable External SSD and KingSpec P3 SSD 4TB Internal 2.5' Solid State Drive 2.5 Inch SATA III 3D NAND Flash Data Storage, Speed up to 520MB/s, laptop PC Desktop product page for detailed specifications and price history.
Frequently Asked Questions
Is SanDisk Professional PRO-G40 4TB Thunderbolt 3 Portable External SSD or KingSpec P3 SSD 4TB Internal 2.5' Solid State Drive 2.5 Inch SATA III 3D NAND Flash Data Storage, Speed up to 520MB/s, laptop PC Desktop a better deal?
As of July 2026, KingSpec P3 SSD 4TB Internal 2.5' Solid State Drive 2.5 Inch SATA III 3D NAND Flash Data Storage, Speed up to 520MB/s, laptop PC Desktop offers better value at $0.0800//GB compared to SanDisk Professional PRO-G40 4TB Thunderbolt 3 Portable External SSD at $0.2122//GB. That is approximately 62% better value per gigabyte.
What is the price per GB of SanDisk Professional PRO-G40 4TB Thunderbolt 3 Portable External SSD?
The SanDisk Professional PRO-G40 4TB Thunderbolt 3 Portable External SSD is currently priced at $0.2122/GB ($849.00 for 4TB) at Newegg.
Where can I buy KingSpec P3 SSD 4TB Internal 2.5' Solid State Drive 2.5 Inch SATA III 3D NAND Flash Data Storage, Speed up to 520MB/s, laptop PC Desktop for the cheapest price?
The cheapest price for the KingSpec P3 SSD 4TB Internal 2.5' Solid State Drive 2.5 Inch SATA III 3D NAND Flash Data Storage, Speed up to 520MB/s, laptop PC Desktop is $319.99 at Newegg, which works out to $0.0800/GB.