Western Digital HDS724040ALE640 4TB 7200RPM HDD

Name: Western Digital HDS724040ALE640 4TB 7200RPM HDD
Brand: Western Digital
SKU: HDS724040ALE640

Overview

The Western Digital (HGST) Deskstar HDS724040ALE640 is a 4TB internal hard drive engineered for demanding, always-on environments. Spinning at 7200 RPM with a 64MB cache buffer and a SATA III 6.0 Gb/s interface, it strikes a balance between high capacity and responsive performance that makes it a practical choice for desktop workstations, network-attached storage, RAID configurations, and CCTV surveillance systems. Its enterprise-grade build quality means it is rated for continuous 24/7 duty cycles — a significant advantage over consumer-class drives that may not tolerate sustained workloads.

Packaged as a bare drive in a standard 3.5-inch form factor, the HDS724040ALE640 is compatible with virtually any system that accepts a SATA hard drive, including PCs, Macs, and dedicated storage appliances. Buyers should note that no cables, screws, or accessories are included, and the drive must be formatted through the host operating system before it will appear as available storage. For users seeking dependable bulk storage without the premium cost of solid-state media, this drive delivers proven reliability backed by HGST's long track record in the enterprise storage market.

Key Features

4TB Capacity, 7200RPM Rotation Speed, 64MB Cache,SATA III 6.0Gb,s, Enterprise Grade, Heavy Duty, 3.5Inches Internal Hard Drive, SATA 6.0Gb,s, Designed for 24,7 reliable operation

Works for Desktop PC, Mac, RAID, NAS, CCTV DVR, Surveillance Storage

Bare Drive Only, Single Pack, (No Screws, Cables or Accessories included)

-Friendly Reminder- Please FORMAT HDD on system in order to be detected, shows on system.

Specifications

Capacity

4 TB

Interface

SATA III 6.0 Gb/s

Form Factor

3.5 inch

Spindle Speed

7200 RPM

Cache Buffer

64 MB

Designed Use

24/7 continuous operation

Compatibility

Desktop PC, Mac, RAID, NAS, CCTV DVR

Packaging

Bare Drive Only (Single Pack)

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Pros & Cons

👍 Pros

4TB capacity provides ample storage for large file libraries, backups, or continuous recording.
7200RPM spindle speed delivers faster data access compared to 5400RPM drives.
Enterprise-grade construction designed for reliable 24/7 operation.
64MB cache buffer helps sustain performance during sequential read and write tasks.
Broad compatibility with desktops, Macs, NAS devices, and surveillance DVRs.

👎 Cons

Bare drive ships without cables, screws, or mounting accessories.
Requires manual formatting before the system will recognize it.
3.5-inch form factor does not fit laptops or compact enclosures designed for 2.5-inch drives.
Mechanical drive produces more noise and heat than a solid-state alternative.

Frequently Asked Questions

Does this hard drive need to be formatted before use?

Yes. The HDS724040ALE640 is a bare drive and must be formatted through your operating system's disk management utility before it will be detected and usable.

What interface does this drive use, and is it compatible with my system?

The drive uses a SATA III 6.0 Gb/s interface, which is backward compatible with SATA II and SATA I ports. It fits any standard 3.5-inch drive bay.

Is this drive suitable for use in a NAS or RAID array?

Yes. The HDS724040ALE640 is an enterprise-grade drive designed for 24/7 operation, making it well-suited for NAS enclosures, RAID arrays, and continuous-duty applications like CCTV DVR recording.

Are mounting screws or SATA cables included?

No. This is a bare drive only — no screws, cables, or accessories are included. You will need to supply your own SATA data cable, power connection, and mounting hardware.

What is the cache size and why does it matter?

The drive has a 64MB cache buffer, which helps improve read and write performance by temporarily storing frequently accessed data closer to the drive's controller.