The MDD MAXDIGITALDATA 500GB 5900RPM 16MB Cache SATA 3.0Gb/s 3.5-inch Surveillance Hard Drive - 3 Year Warranty costs $0.0600/GB while the WD - Purple 4TB Surveillance Internal Hard Drive costs $0.0350/GB. WD - Purple 4TB Surveillance Internal Hard Drive offers 42% better value per gigabyte as of May 2026. Both products are available on BuyPerUnit with prices from Amazon, Best Buy, and Newegg.
MDD MAXDIGITALDATA 500GB 5900RPM 16MB Cache SATA 3.0Gb/s 3.5-inch Surveillance Hard Drive - 3 Year Warranty vs WD - Purple 4TB Surveillance Internal Hard Drive — Which Is Better Value?
WD - Purple 4TB Surveillance Internal Hard Drive
Specification Comparison
| Spec | MDD MAXDIGITALDATA 500GB 5900RPM 16MB Cache SATA 3.0Gb/s 3.5-inch Surveillance Hard Drive - 3 Year Warranty | WD - Purple 4TB Surveillance Internal Hard Drive |
|---|---|---|
| Brand | MDD MAXDIGITALDATA | Western Digital |
| Capacity | 500 GB | 4 TB |
| $/GB | $0.0600 | $0.0350 |
| Price | $29.99 | $139.99 |
| Retailer | Amazon | Best Buy |
| Category | Hard Drives (HDD) | Hard Drives (HDD) |
| Subcategory | hdd | hdd |
Price Across Retailers
Which Should You Buy?
Based on current pricing data, the WD - Purple 4TB Surveillance Internal Hard Drive offers better value at $0.0350//GB compared to the MDD MAXDIGITALDATA 500GB 5900RPM 16MB Cache SATA 3.0Gb/s 3.5-inch Surveillance Hard Drive - 3 Year Warranty at $0.0600//GB — that's roughly 42% less per gigabyte.
The best deal for the WD - Purple 4TB Surveillance Internal Hard Drive is $139.99 at Best Buy, while the MDD MAXDIGITALDATA 500GB 5900RPM 16MB Cache SATA 3.0Gb/s 3.5-inch Surveillance Hard Drive - 3 Year Warranty starts at $29.99 at Amazon.
However, price per gigabyte isn't everything — consider factors like warranty, performance specs, brand reliability, and your specific capacity needs. Check each MDD MAXDIGITALDATA 500GB 5900RPM 16MB Cache SATA 3.0Gb/s 3.5-inch Surveillance Hard Drive - 3 Year Warranty and WD - Purple 4TB Surveillance Internal Hard Drive product page for detailed specifications and price history.
Frequently Asked Questions
Is MDD MAXDIGITALDATA 500GB 5900RPM 16MB Cache SATA 3.0Gb/s 3.5-inch Surveillance Hard Drive - 3 Year Warranty or WD - Purple 4TB Surveillance Internal Hard Drive a better deal?
As of May 2026, WD - Purple 4TB Surveillance Internal Hard Drive offers better value at $0.0350//GB compared to MDD MAXDIGITALDATA 500GB 5900RPM 16MB Cache SATA 3.0Gb/s 3.5-inch Surveillance Hard Drive - 3 Year Warranty at $0.0600//GB. That is approximately 42% better value per gigabyte.
What is the price per GB of MDD MAXDIGITALDATA 500GB 5900RPM 16MB Cache SATA 3.0Gb/s 3.5-inch Surveillance Hard Drive - 3 Year Warranty?
The MDD MAXDIGITALDATA 500GB 5900RPM 16MB Cache SATA 3.0Gb/s 3.5-inch Surveillance Hard Drive - 3 Year Warranty is currently priced at $0.0600/GB ($29.99 for 500 GB) at Amazon.
Where can I buy WD - Purple 4TB Surveillance Internal Hard Drive for the cheapest price?
The cheapest price for the WD - Purple 4TB Surveillance Internal Hard Drive is $139.99 at Best Buy, which works out to $0.0350/GB.