NAS and drive combination

DS423 + 4 × 4TB IronWolf

See how much you can store, choose your drive protection, and compare the cost of this NAS and drive combination.

Your storage plan

How much can you really store?

4 × 4 TB drives in your DS423. Adjust the plan and see the trade-offs instantly.

Live estimate

1. Choose your drive protection

Protection uses some capacity to keep files accessible if a drive fails.

One-drive protectionStarting pointRAID 5 · 1 drive can fail12 TBbefore reserveTwo-drive protectionRAID 6 · 2 drives can fail8 TBbefore reserveMaximum capacityNo drive-failure protection16 TBbefore reserve

Starting point: one-drive protection, based on drive count. Confirm that your NAS supports the chosen layout.

2. Leave room to grow

Custom%

2.4 TB kept free for future files. We start with 20%; adjust it for your needs.

3. Check your own needs · optional

Your files today (TB)See whether everything will fit.Your spending limit (USD)Compare the NAS + drive cost.

Space for your files 9.6 TBView result ↑

Space for your files

9.6 TB

After drive protection and 20% growth reserve.

For files: 9.6 TB
Kept free: 2.4 TB
For protection: 4 TB

Designed to tolerate 1 drive failure.RAID protects against drive failure, not accidental deletion. Keep a separate backup.

Dated price estimate · NAS + 4 drives

$1,159.95

Check live store prices. Tax, shipping and backup are extra.

Adjust protection & space ↓Compare stores for this build

Includes your protection, reserve and optional inputs.

Assumptions & calculation details

Capacity is conditional arithmetic for equal-size drives, before formatting and system overhead. RAID support, firmware and vendor drive compatibility are not certified. Budget compares dated component amounts, excluding tax, shipping and a separate backup. RAID is not a backup. Defaults are planning starting points, not a vendor compatibility recommendation. Your own values in a shared link take priority.

Selected components

Dated price estimate calculation

$399.99 + (4 × $189.99) = $1,159.95

Estimated from separately purchased components. Confirm final prices and stock at the stores; tax and shipping are extra.

NAS: recently observed · Oct 9, 2026. Drives: recently observed · Oct 9, 2026.

NAS price checked: Oct 9, 2026
Drive price checked: Oct 9, 2026
Shipping and tax: Not included

Verify before purchase

Use the linked specifications and vendor compatibility policy to confirm the exact NAS, drive MPN, firmware, seller, condition, warranty, stock, and final checkout price. Drive quantity must fit the primary bays, but that physical check alone does not certify vendor support.