The Western Digital 4TB WD Purple Surveillance Internal Hard Drive HDD - SATA 6 Gb/s, 256 MB Cache, 3.5" - WD43PURZ costs $0.0324/GB while the SCSI Industrial Medical Hard Disk ST318437LW For 18GB 68Pin 7200RPM 3.5' Hard Drive Works ly Fast Ship costs $8.0733/GB. Western Digital 4TB WD Purple Surveillance Internal Hard Drive HDD - SATA 6 Gb/s, 256 MB Cache, 3.5" - WD43PURZ offers 100% better value per gigabyte as of May 2026. Both products are available on BuyPerUnit with prices from Amazon, Best Buy, and Newegg.
Western Digital 4TB WD Purple Surveillance Internal Hard Drive HDD - SATA 6 Gb/s, 256 MB Cache, 3.5" - WD43PURZ vs SCSI Industrial Medical Hard Disk ST318437LW For 18GB 68Pin 7200RPM 3.5' Hard Drive Works ly Fast Ship — Which Is Better Value?
Specification Comparison
| Spec | Western Digital 4TB WD Purple Surveillance Internal Hard Drive HDD - SATA 6 Gb/s, 256 MB Cache, 3.5" - WD43PURZ | SCSI Industrial Medical Hard Disk ST318437LW For 18GB 68Pin 7200RPM 3.5' Hard Drive Works ly Fast Ship |
|---|---|---|
| Brand | Western Digital | |
| Capacity | 4 TB | 18GB |
| $/GB | $0.0324 | $8.0733 |
| Price | $129.77 | $145.32 |
| Retailer | Amazon | Newegg |
| Category | Hard Drives (HDD) | Hard Drives (HDD) |
| Subcategory | hdd | hdd |
Price Across Retailers
Which Should You Buy?
Based on current pricing data, the Western Digital 4TB WD Purple Surveillance Internal Hard Drive HDD - SATA 6 Gb/s, 256 MB Cache, 3.5" - WD43PURZ offers better value at $0.0324//GB compared to the SCSI Industrial Medical Hard Disk ST318437LW For 18GB 68Pin 7200RPM 3.5' Hard Drive Works ly Fast Ship at $8.0733//GB — that's roughly 100% less per gigabyte.
The best deal for the Western Digital 4TB WD Purple Surveillance Internal Hard Drive HDD - SATA 6 Gb/s, 256 MB Cache, 3.5" - WD43PURZ is $129.77 at Amazon, while the SCSI Industrial Medical Hard Disk ST318437LW For 18GB 68Pin 7200RPM 3.5' Hard Drive Works ly Fast Ship starts at $145.32 at Newegg.
However, price per gigabyte isn't everything — consider factors like warranty, performance specs, brand reliability, and your specific capacity needs. Check each Western Digital 4TB WD Purple Surveillance Internal Hard Drive HDD - SATA 6 Gb/s, 256 MB Cache, 3.5" - WD43PURZ and SCSI Industrial Medical Hard Disk ST318437LW For 18GB 68Pin 7200RPM 3.5' Hard Drive Works ly Fast Ship product page for detailed specifications and price history.
Frequently Asked Questions
Is Western Digital 4TB WD Purple Surveillance Internal Hard Drive HDD - SATA 6 Gb/s, 256 MB Cache, 3.5" - WD43PURZ or SCSI Industrial Medical Hard Disk ST318437LW For 18GB 68Pin 7200RPM 3.5' Hard Drive Works ly Fast Ship a better deal?
As of May 2026, Western Digital 4TB WD Purple Surveillance Internal Hard Drive HDD - SATA 6 Gb/s, 256 MB Cache, 3.5" - WD43PURZ offers better value at $0.0324//GB compared to SCSI Industrial Medical Hard Disk ST318437LW For 18GB 68Pin 7200RPM 3.5' Hard Drive Works ly Fast Ship at $8.0733//GB. That is approximately 100% better value per gigabyte.
What is the price per GB of Western Digital 4TB WD Purple Surveillance Internal Hard Drive HDD - SATA 6 Gb/s, 256 MB Cache, 3.5" - WD43PURZ?
The Western Digital 4TB WD Purple Surveillance Internal Hard Drive HDD - SATA 6 Gb/s, 256 MB Cache, 3.5" - WD43PURZ is currently priced at $0.0324/GB ($129.77 for 4 TB) at Amazon.
Where can I buy SCSI Industrial Medical Hard Disk ST318437LW For 18GB 68Pin 7200RPM 3.5' Hard Drive Works ly Fast Ship for the cheapest price?
The cheapest price for the SCSI Industrial Medical Hard Disk ST318437LW For 18GB 68Pin 7200RPM 3.5' Hard Drive Works ly Fast Ship is $145.32 at Newegg, which works out to $8.0733/GB.