Where is the hard drive inserted in a laptop: 3 types of bays and 5 mistakes when replacing

You bought a new one SSD or HDD, but don’t know where to insert it in your laptop? This problem is familiar to many: manufacturers hide drive bays in the most unexpected places, and instructions are often silent about the nuances. In modern ultrabooks, the slot can be hidden under the keyboard, in budget models - under a separate cover, and in gaming laptops sometimes two connectors are provided at once.

In this article we will look at all possible options for the location of hard drives in laptops 2020–2026, we’ll show you how to determine the type of compartment based on the device model, and warn you against typical mistakes when replacing it. You will find out how they differ M.2, SATA And PCIe-storage drives, why some laptops cannot have a second drive, and what to do if the slot is occupied by optical drives (yes, there are still such ones!).

1. Types of hard drive bays in laptops

Before you look for where the hard drive fits, you need to understand what type of drive your laptop supports. This determines not only the location of the slot, but also compatibility with the new drive. All modern laptops are divided into three categories:

• 🔧 With a separate compartment for 2.5" SATA - classic option for HDD/SSD with a thickness of 7 or 9.5 mm. Found in budget and office laptops (Dell Inspiron, HP Pavilion, Acer Aspire).
• 🖥️ With M.2 slot (NVMe/SATA) — compact connector for solid-state drives in stick format. Used in ultrabooks (Lenovo ThinkPad, MacBook Pro, Asus ZenBook).
• 🔄 Hybrid models - have and SATA-compartment, and M.2-slot Typical for gaming laptops (MSI GE76, Asus ROG Strix, Legion Lenovo).

How to determine which slot is in your laptop? The most reliable way is to look into user manual (search by model on the manufacturer's website). An alternative is to use utilities like HWiNFO or CrystalDiskInfo, which will show the current drives and free slots. For example, if the report states SATA III And PCIe 4.0 x4, which means the laptop has both types of slots.

2. Where to look for the hard drive slot: 3 main places

Let's sort it out all possible locations, where manufacturers install drive bays. Important: in 90% of cases you will need a Phillips screwdriver (usually PH0 or PH1) and a plastic spatula for disassembly.

2.1. Separate cover on the bottom of the laptop

The most convenient option is when the slot for HDD/SSD hidden under a small removable panel. It could be:

• 📏 Rectangular (more often in Dell And HP) - usually located closer to the center or left edge.
• 🔳 Square (typical for Lenovo IdeaPad) - often signed with a hard drive icon.
• 🔧 With 1–2 screw fastening - in budget models (Acer Extensa, Asus VivoBook).

Example: in Dell Latitude 7490 slot M.2 hidden under a cover with an inscription M.2 SSD, and in HP ProBook 450 G8 — under the panel with the 💾 icon. If there are no obvious markings on the bottom, look for a cover that has a different texture or is smaller in size than the main back panel.

2.2. Under the keyboard or touchpad

In ultrabooks (for example, MacBook Air, Lenovo Yoga, Huawei MateBook) compartment for SSD It is not under a separate cover - it is hidden under the keyboard. To get to it:

1. Turn off the laptop and remove the battery (if it is removable).
2. Unscrew the screws on the bottom (they may be hidden under the rubber feet).
3. Using a plastic spatula, carefully pry up the keyboard, starting at the top edge.

In some models (for example, Asus ZenBook UX330) slot M.2 located under the touchpad. To open it, you need:

1. Remove the bottom cover of the laptop.
2. Disconnect the touchpad cable (usually it is secured with a latch).
3. Remove the touchpad - underneath there will be a metal compartment for NVMe drive.

2.3. In the optical drive bay (DVD)

In older or budget laptops (e.g. Lenovo G50, Acer Aspire E5) the slot for the second hard drive can be hidden where it used to be DVD drive. To use it:

• 🛠️ Buy skid adapter (For example, 9.5 mm → 2.5") for mounting HDD/SSD.
• 🔧 Remove the DVD drive (usually it is secured with 1-2 screws and a retainer).
• 💽 Install the adapter with the drive into the vacant compartment.

How can you tell if your laptop has a free DVD slot?

If the specifications indicate “Optical drive: none,” but there is a compartment measuring ~13x13 cm with fasteners on the bottom, most likely you can install a second HDD/SSD there.

Laptop type	Slot location	Examples of models
Office	Separate cover on the bottom	Dell Latitude, HP EliteBook, Lenovo ThinkPad T-series
Ultrabook	Under the keyboard/touchpad	MacBook Pro, Asus ZenBook, Huawei MateBook X
Gaming	Two slots: M.2 + SATA	MSI GS66, Asus ROG Zephyrus, Lenovo Legion
Budget	In the DVD drive bay	Acer Aspire 3, Lenovo IdeaPad 3, HP 250 G8

3. How to determine a free slot without disassembling the laptop

Taking your laptop apart just to check it out is not a good idea, especially if you're not sure there's a free slot. Here 3 ways find out in advance:

• 🔍 Checking via BIOS/UEFI: Restart the laptop, go to the BIOS (usually the F2, Del or Esc) and find the section Storage or SATA Configuration. If it says Not Detected next to one of the ports - the slot is free.
• 💻 Windows Device Manager: Open Device Manager → Disk Devices. If there is only one disk, and the laptop’s specifications indicate two slots, the second one is free.
• 📄 Manufacturer documentation: On the brand website (in the section Support) search Hardware Maintenance Manual for your model. There are component layout diagrams there.

Example: in Lenovo ThinkPad T480 in BIOS Both slots are displayed - M.2 PCIe And SATA. If one of them contains None, you can borrow it. B Asus ROG Strix G15 free M.2-the slot may not be displayed in the BIOS, but its presence is confirmed by the documentation.

⚠️ Attention: On laptops Apple (2016–2023) and some HP Spectre The drives are often soldered to the motherboard. There is no point in trying to replace them yourself - soldering is required.

4. Step-by-step instructions: how to insert an SSD/HDD into a laptop

Let's look at the universal algorithm for installing a drive using the example of a laptop with a separate cover for SATA-disk (for example, Dell Inspiron 15). For M.2 the steps will be similar, but with nuances.

4.1. Preparing tools

You will need:

• ⚒️ Phillips screwdriver (PH0 or PH1).
• 🧲 Antistatic bracelet (or ground yourself by touching the radiator).
• 📦 New drive (check form factor: 2.5" for SATA, 2280/2242 for M.2).
• 🔋 SIM card remover or plastic spatula (for prying off the cover).

4.2. Removing the old disk (if necessary)

If you are replacing a disk rather than adding a second one:

1. Unplug your laptop and turn it over.
2. Unscrew the compartment cover screws (they may be hidden under stickers).
3. Gently pull the locking tab or lift the disc up.
4. Disconnect SATA cable (if present) and remove the drive.

B M.2- the drive is secured in the slots with one screw. Unscrew it and the drive will lift up slightly - pull on the edge to remove it.

4.3. Installing a new drive

For 2.5" SATA drive:

1. Insert the drive into the drive tray (if equipped) or directly into the drive bay.
2. Connect SATA cable (in some laptops it is built into the connector).
3. Secure the disk with screws (usually 4 pieces in the corners).
4. Return the cover to its place and screw it on.

For M.2 NVMe/SATA:

1. Insert the drive into the slot at an angle of ~30°.
2. Press lightly until it “sits” into the connector.
3. Tighten the fixing screw (do not overtighten!).

4.4. First startup and setup

After installation:

1. Turn on your laptop and go to BIOS/UEFI.
2. Check that the new drive appears in the partition Storage.
3. If the drive is not visible in Windows, open Disk management (Win + X → Disk Management) and initialize it.

⚠️ Attention: If you cloned the system from an old disk to a new one, but the laptop does not boot, check the boot order in the BIOS (Boot Order). Sometimes the new disk is detected as UEFI, and the old one is like Legacy.

5. Common mistakes when installing a hard drive

Even experienced users sometimes make mistakes that lead to drive failure or damage to the laptop. Here TOP 5 misses and how to avoid them:

• 🔌 Battery not disconnected: If the battery is removable, remove it before use. Otherwise, you risk a short circuit when touching the motherboard.
• 🔧 Overtightened screws: B M.2- in the slots, the screw should fix the disk, but not put pressure on it. Over-tightening will damage the connector.
• 📏 Incompatible form factor: For example, M.2 2242 will not fit into the slot 2280. Check the drive length before purchasing!
• 🔄 Wrong boot order: After replacing the system disk, the laptop may not boot. Go into the BIOS and put the new drive first in Boot Priority.
• 🛡️ Ignoring antistatic agents: Discharge static electricity by touching a grounded object. Otherwise, you risk burning out the disk controller.

Case study: in Asus TUF Gaming A15 users often confuse slots M.2 for SSD and Wi-Fi. If you insert the drive into the slot for the wireless module, the system will not see it, and Wi-Fi will stop working.

6. Drive compatibility: what can be inserted into your laptop

Not all drives fit all laptops. Here are the key compatibility points:

Slot type	Supported drives	Max. speed	Examples of laptops
SATA III (2.5")	HDD, SSD (SATA)	6 Gbit/s (~550 MB/s)	Lenovo ThinkPad E-series, Dell Vostro
M.2 SATA	SSD (SATA, for example, Crucial MX500)	6 Gbit/s (~550 MB/s)	HP Pavilion x360, Acer Swift 3
M.2 PCIe 3.0 x4 (NVMe)	NVMe SSD (eg. Samsung 970 EVO)	32 Gbit/s (~3500 MB/s)	Asus ROG Strix, MSI Modern 14
M.2 PCIe 4.0 x4 (NVMe)	SSD NVMe 4.0 (e.g. WD Black SN850)	64 Gbit/s (~7000 MB/s)	Lenovo Legion 7, Gigabyte Aorus 15

How to find out which M.2-Does the drive support your laptop?

• 🔍 Look at the specifications on the manufacturer’s website (look for lines like M.2 2280 PCIe x4 NVMe).
• 🛠️ Use the utility HWiNFO: in section Drives The protocol (SATA or PCIe) and version (3.0/4.0) will be indicated.
• 📏Measure the slot length: 2242 (42 mm), 2260 (60 mm), 2280 (80 mm).

Important: some laptops (eg Lenovo Yoga C940) support only PCIe 3.0, although it will physically fit into them PCIe 4.0-storage In this case, the disk will operate at a reduced speed.

7. What to do if there is no free slot in the laptop

If your laptop only has one slot and it's occupied, there is 4 alternative ways expand storage:

• 🔄 Replacing the current disk with a capacious one: For example, change HDD 500 GB on SSD 2 TB (For example, Samsung 870 QVO).
• 💾 External SSD/HDD: Connect the drive via USB 3.2 or Thunderbolt (speed up to 10 Gbit/s). Examples: Samsung T7, WD My Passport SSD.
• 📇 Memory card adapter: Some laptops (eg Microsoft Surface) support microSD up to 1 TB.
• ☁️ Cloud storage: Suitable for documents and photos Google Drive, Yandex Disk or iCloud.

If you choose an external SSD, pay attention to the interface:

• USB 3.2 Gen 1 (5 Gbit/s) - for office tasks.
• USB 3.2 Gen 2 (10 Gbps) - for working with videos and games.
• Thunderbolt 3/4 (40 Gbps) - for professional tasks (for example, 4K editing).

⚠️ Attention: In laptops with a soldered drive (for example, MacBook Air M1) it is impossible to replace the disk. The only way out is external storage.

FAQ: Answers to frequently asked questions

Is it possible to insert an SSD into an HDD slot without an adapter?

Yes, if we're talking about 2.5" SATA-SSD (For example, Crucial BX500 or Kingston A400). They have the same connector and form factor as the HDD, so they are installed directly. The adapter is only needed for installation in the optical drive bay.

How do you know if a laptop supports two drives?

Check:

1. Characteristics on the manufacturer's website (look for lines like Dual Storage or 2x M.2).
2. Photo of a disassembled laptop iFixit or in reviews on YouTube.
3. Availability of a free connector in BIOS (section Storage).

Example: in Asus TUF Dash F15 there are two M.2-slots, but one of them may be occupied by a Wi-Fi module.

What happens if you insert a SATA-SSD into an M.2 slot for NVMe?

It's okay - the disk just won't be detected. Connectors M.2 SATA And M.2 NVMe externally identical, but electrically incompatible. Please note keys (cutouts) on the drive:

• B-key (cutout on the right) - SATA only.
• M-key (cutout on the left) - NVMe only.
• B+M key (two cutouts) - universal (suitable for both types).

Do I need to format the new drive before installation?

No, formatting is not necessary. After installation:

1. Windows will prompt you to initialize the drive the first time you connect.
2. B Disk Management you can create a partition and format it in NTFS or exFAT.

If the disk has already been used, it is better to do full formatting (not fast!) via Disk management.

Is it possible to install HDD and SSD at the same time?

Yes, if the laptop has two physical slots. Popular combinations:

• HDD 1 TB (for files) + SSD 500 GB (for the system) - optimal for gaming laptops.
• Two SSDs (For example, NVMe for OS and SATA for games) - for maximum speed.

Example: in Lenovo Legion 5 can be installed M.2 NVMe (for Windows) and 2.5" SATA SSD (for projects).