Buy a M.2 SATA 2242 drive from:
✅ Kingston KC600
✅ Transcend TS512GMTS430S
✅ WD Green M.2 2242 SATA
❌ Avoid any drive labeled “NVMe” or “PCIe” – they will not work.

If you can’t find a 2242/2260 SATA drive easily, just upgrade the 2.5" bay to a standard 2.5" SATA SSD – it’s cheaper, easier, and performs identically. The M.2 slot is convenient but not necessary.


HP ProBook 450 G2 has a dedicated M.2 slot, but compatibility is highly specific regarding the drive's physical size and interface. Key Compatibility Specifications Interface Type drives are supported. : This model does not support NVMe/PCIe SSDs

. While an NVMe drive might physically fit and even show up in the BIOS, it will typically not be recognized by Windows or usable as a boot drive. Physical Form Factor : It requires the size (22mm wide x 42mm long).

The more common 2280 size (80mm long) will not fit in the available space. Storage Capacity : Official documentation often lists a

limit, but community users have successfully used larger capacities like HP Support Community Installation & Slot Location HP ProBook 450 G2 SSD Upgrade - HP Support Community

Upgrading an HP ProBook 450 G2 with an M.2 SSD is a common way to boost performance, but because of its age, it has very specific hardware limitations that differ from modern laptops. Core Compatibility Specifications

To ensure a successful upgrade, your M.2 drive must meet these three non-negotiable criteria: Interface Type: SATA ONLY. The M.2 slot in the ProBook 450 G2 uses the SATA bus. NVMe (PCIe) drives will not work , even if they physically fit into the slot. Physical Form Factor: 2242.

The slot is designed for the shorter 42mm length. The most common M.2 size (2280) is too long to fit. Storage Capacity:

HP originally certified this model for up to 120GB M.2 SSDs. However, users have successfully used larger capacities, such as 240GB or 256GB

, as the BIOS generally recognizes larger SATA-based M.2 drives. HP Support Community Why M.2 SATA vs. NVMe Matters

While modern "M.2" often implies high-speed NVMe, the ProBook 450 G2 was released during a transition period.

Operates at speeds identical to a standard 2.5-inch SSD (roughly 500-550 MB/s).

Operates over PCIe and is much faster, but the motherboard circuitry in the 450 G2 does not support this protocol. HP Support Community Upgrade Options & Layout

The ProBook 450 G2 is unique because it allows for dual-drive configurations: HP probook 450 G2 support which Mini-card SSD

The HP ProBook 450 G2 includes a dedicated M.2 slot, but it is highly specific and does not support modern NVMe drives. To upgrade successfully, you must use a SATA-based M.2 SSD in the 2242 size format. 🛠️ Key Compatibility Specs Interface Type: SATA only (M.2 NGFF).

Physical Size: 2242 (22mm wide x 42mm long). Standard 2280 drives are too long to fit.

Unsupported Technology: PCIe/NVMe drives are not compatible and will not be detected by the operating system, even if they fit the physical slot.

Capacity: Officially supported up to 120GB/128GB, but users have reported success with 240GB+ units as the limit was often based on what was available at the time of manufacture. 💾 Storage Upgrade Options

The ProBook 450 G2 is a "dual-storage" capable machine, meaning you can run two drives simultaneously:

Primary 2.5" Bay: This usually holds your original HDD. You can swap this for a standard 2.5-inch SATA SSD for the most significant speed boost.

M.2 Slot: Located under the service door. This is often used for a small "cache" drive or a secondary OS drive.

Optical Drive Bay: You can replace the DVD drive with a "HDD Caddy" to add a third 2.5-inch drive. ⚠️ Critical Installation Notes

The Slot Location: The M.2 slot is found next to the wireless card under the main service panel.

Bootability: The M.2 SATA SSD can be used as a boot drive, allowing you to keep a large HDD for files in the main bay.

CPU Limitation: Some models with Celeron or Pentium processors may not have the M.2 slot enabled or present on the motherboard. If you'd like, I can help you:

Find a step-by-step disassembly guide for this specific model.

Recommend specific 2242 SATA SSD models that are currently available.

Help you clone your current Windows installation to a new SSD.

Let me know which processor you have so I can confirm your slot is active! HP ProBook 450 G2 SSD Upgrade - HP Support Community

Title: The Legacy Upgrade: A Comprehensive Guide to M.2 SSD Compatibility for the HP ProBook 450 G2

In the lifecycle of a business laptop, there comes a tipping point where performance begins to wane, not because the processor is obsolete, but because storage speeds have become a bottleneck. The HP ProBook 450 G2, a robust workhorse released in the mid-2010s, is a prime candidate for revitalization. However, upgrading its storage isn't as simple as buying the latest drive on sale.

The ProBook 450 G2 sits on the precipice of a major technological transition in storage interfaces. For users looking to breathe new life into this machine via an M.2 SSD, the waters are murky. This guide demystifies the compatibility quirks, hardware limitations, and specific requirements needed to successfully upgrade the ProBook 450 G2.

Because M.2 SATA drives are becoming legacy tech, they are slowly disappearing from shelves. You need to specifically look for "M.2 SATA SSD" labels.

Compatible examples include:

Avoid: Any drive labeled "NVMe," "PCIe," or typically drives that feature the "M-key" notch on the right side (though some SATA drives have dual notches, pure M-key drives are a no-go).

The ProBook 450 G2 comes standard with a 9.5mm height, 2.5-inch SATA III hard drive bay (6 Gbps). Installing a standard SATA SSD here delivers:

Forget the M.2 slot for storage. Instead, use these proven methods:

| Upgrade Method | Compatibility | Performance | Difficulty | | :--- | :--- | :--- | :--- | | Replace main HDD with 2.5" SATA SSD | 100% compatible. Any brand (Samsung, Crucial, WD, SanDisk). | SATA III (6 Gbps) – Up to 550 MB/s. | Easy (remove bottom cover, swap drive). | | Replace optical drive with 2nd SSD | 100% compatible using a 9.5mm SATA caddy (e.g., from OWC, Nimitz, or generic). | SATA II (3 Gbps) – Slower than main port, but fine for storage. | Moderate (remove one screw, replace drive). |

Best SSD choices for the ProBook 450 G2:

Note: If the laptop still has its original hard drive, the performance difference after upgrading to any SATA SSD will be massive (10x faster boot, snappier apps).

| Question | Answer | | :--- | :--- | | Can I install an M.2 SSD in the HP ProBook 450 G2? | No. | | Why not? | The M.2 slot is for a WWAN card (cellular modem), not storage. The BIOS and hardware do not support M.2 SSDs. | | What should I do instead? | Replace the main 2.5" drive with a SATA SSD, and optionally add a second SSD in the optical drive bay. |

Do not waste money buying an M.2 SSD for this laptop. It will not fit properly (length issues) or will be completely undetectable. Stick to standard 2.5-inch SATA SSDs for a reliable, high-performance upgrade.


Before buying any hardware, you must open the laptop (or consult the HP Maintenance and Service Guide) to understand what ports are actually present.

The HP ProBook 450 G2 motherboard contains two distinct storage interfaces:

Bottom Line Up Front: The HP ProBook 450 G2 does support an M.2 SSD, but with very specific limitations. Do not buy a standard NVMe drive – it will not work. You need a SATA-based M.2 2242 or 2260 SSD.