So, you’re on the hunt for a storage upgrade, specifically the Lexar best 4TB SSD 2242 for Legion? We totally get it! Lenovo Legion laptops are powerhouses, and getting the right SSD can supercharge your gaming, creative work, or everyday productivity. You’re likely looking to boost speed, capacity, and overall responsiveness.
While finding a specific 4TB M.2 2242 SSD, especially from Lexar, can be a bit tricky – the 2242 form factor is quite niche for such high capacities – many Legion users opt for popular 2280 internal drives or powerful portable SSDs to meet their needs. Some Legion models, like the original Legion Go handheld, do indeed use a 2242 slot, while others, particularly the larger laptops, typically use 2280.
In this guide, we’re diving deep into some top-tier Lexar and Crucial SSDs that offer incredible performance and ample 4TB storage (with a couple of robust 2TB options for specific use cases). We’ll explore internal NVMe drives perfect for boosting your system’s core, and external portable SSDs that offer massive, fast storage on the go. Let’s find the perfect fit to elevate your Legion experience!
Product Reviews: Top SSDs for Your Legion
Here’s a look at some of the best SSD options, including those from Lexar and Crucial, that could be a fantastic upgrade for your Legion setup.
1. Lexar 4TB NM790 SSD PCIe Gen4 NVMe M.2 2280 Internal

If raw speed and efficiency are your game, the Lexar NM790 4TB SSD is a phenomenal contender. This internal M.2 2280 NVMe drive delivers a serious punch, offering speeds that will make your games load in a flash and your large files transfer almost instantly. It’s built for serious users who demand top-tier performance without compromise, perfect for a high-end Legion gaming laptop.
- Key Features:
- [4TB] Exceptional performance up to 7400MB/s read, 6500MB/s write
- 3000TBW endurance rating
- 2x faster than PCIe Gen 3 SSDs
- Up to 40% less power consumption than DRAM cache-enabled PCIe Gen 4 SSDs
- Host Memory Buffer (HMB) 3.0 for smoother transfer speeds
- Designed for hardcore gamers, professionals, and creators
- Compatible with PlayStation 5
- Single-sided NVMe SSD is perfect for laptops
- Five-year limited warranty
- Pros:
- Blazing-fast Gen4 speeds dramatically reduce load times
- Excellent power efficiency helps with laptop battery life
- High endurance rating ensures longevity
- Single-sided design is great for compact laptops
- Cons:
- Requires a PCIe Gen4 compatible M.2 2280 slot
- Doesn’t include a heatsink (might be an issue in some setups)
- User Impressions: Users rave about the speed improvements, noting how quickly their systems boot and games load. Many highlight its fantastic value for money given the performance. It’s often praised as a reliable and high-performing upgrade for modern systems.
- See it on Amazon here
2. Lexar 4TB NM790 SSD with Heatsink PCIe Gen4 NVMe M.2 2280

For those who want the incredible performance of the Lexar NM790 but with added thermal peace of mind, this version comes pre-equipped with a heatsink. This is a game-changer for sustained performance, especially in intense gaming sessions or heavy data transfers on your Legion. Keeping temperatures down means consistent speeds and longer drive life – a win-win!
- Key Features:
- [4TB] Exceptional performance up to 7400MB/s read, 6500MB/s write
- 3000TBW endurance rating
- 2x faster than PCIe Gen 3 SSDs
- Designed with a heatsink to keep your rig cool for better performance
- Up to 40% less power consumption than DRAM cache-enabled PCIe Gen 4 SSDs
- Host Memory Buffer (HMB) 3.0 for smoother transfer speed
- Compatible with PlayStation 5
- Five-year limited warranty
- Pros:
- Integrated heatsink ensures optimal thermal management
- Sustained high performance under heavy loads
- Excellent read/write speeds for fast gaming and content creation
- Good power efficiency
- Cons:
- Heatsink might make it too tall for extremely thin laptops
- Requires a PCIe Gen4 compatible M.2 2280 slot
- User Impressions: Customers love the “set it and forget it” aspect of the heatsink, confident that their drive won’t thermal throttle. Gamers specifically mention the consistent performance during long sessions. It’s considered a robust upgrade for high-performance systems.
- See it on Amazon here
3. Lexar 4TB Play SSD with Heatsink PCIe Gen 4×4 NVMe

The Lexar Play SSD is specifically engineered with gamers in mind, making it a fantastic choice for your Legion. With its impressive speeds and included heatsink, it’s ready to handle the most demanding game titles. While it mentions PS5 compatibility, its features like HMB and SLC Dynamic cache make it a stellar performer for PC gaming too, ensuring smooth gameplay and rapid load times.
- Key Features:
- Designed to coordinate with your PS5, made to enhance gaming experience
- 7400MB/s max read and 6500MB/s max write speeds ensure reduced load times
- 4TB: 3200TBW endurance rating
- Tested and approved storage for PS5, allows playing games right off the drive
- Unique heatsink for effortless installation and enhanced cooling
- HMB and SLC Dynamic cache deliver improved performance for PC gaming
- Five-year limited warranty
- Pros:
- Optimized for gaming performance and reduced load times
- Built-in heatsink for superior thermal management
- High endurance rating for long-term use
- Versatile for both console and PC gaming setups
- Cons:
- Might be overkill for non-gaming specific use
- Heatsink may limit compatibility with ultra-slim devices
- User Impressions: Gamers consistently praise its ability to cut down loading screens significantly. The heatsink is frequently highlighted as a great feature for peace of mind. Users feel it’s a premium gaming drive that delivers on its promises.
- See it on Amazon here
4. Lexar 4TB Armor 700 Portable SSD, Up to 2000MB/s, USB

Sometimes, internal storage isn’t enough, or you need rugged, fast external storage. The Lexar Armor 700 is a beast of a portable SSD, perfect for Legion users who need to carry massive files or an extensive game library. Its blazing-fast USB 3.2 Gen 2×2 performance means you won’t be waiting around, and its incredibly durable, water/dust-resistant design makes it ready for any adventure.
- Key Features:
- Blazing-fast USB 3.2 Gen 2×2 performance of 2000MB/s max read/write speeds
- Rated IP66 for water and dust protection
- Rugged design withstands up to 3-meter drops
- Supports Apple Pro Res recording (iPhone 15 Pro/Max)
- Unique Thermal Control Design ensures optimal temperatures
- Wide compatibility with PC, Mac, Android, cameras, gaming consoles, etc.
- Includes Lexar DataShield 256-bit AES encryption
- Includes a Type-C and USB-A all-in-one cable
- Five-year limited warranty
- Pros:
- Extreme durability for protection against elements and drops
- Very fast portable speeds for large file transfers
- Excellent for creative professionals and outdoor use
- Hardware encryption adds an extra layer of security
- Cons:
- USB 3.2 Gen 2×2 port needed for maximum speed (not all devices have it)
- Larger and heavier than some other portable SSDs
- User Impressions: Users love its ruggedness and the peace of mind it offers when traveling or working outdoors. The speed is consistently praised for making large video and photo transfers quick. It’s seen as a reliable and robust workhorse for external storage.
- See it on Amazon here
5. Lexar 4TB SL500 Portable SSD, Up to 2000MB/s, Compatible

If you’re looking for a sleeker, more pocket-friendly alternative to the Armor 700 but still demand high speed and a substantial 4TB capacity for your Legion, the Lexar SL500 is your pick. Its super-thin metal design makes it incredibly portable, while still delivering impressive USB 3.2 Gen 2×2 speeds. It’s perfect for carrying around your game library or critical work files without adding bulk.
- Key Features:
- Incredible USB 3.2 Gen 2×2 performance up to 2000MB/s read and 1800MB/s write
- Thin, lightweight, and durable metal design
- Supports Apple Pro Res recording (iPhone 15 Pro/Max)
- Wide compatibility with mobile devices, laptops, cameras, Xbox, PS4/PS5
- Unique Thermal Control Design for optimal temperatures
- Equipped with a Type-C data cable for plug-and-play
- Includes Lexar DataShield 256-bit AES encryption software
- Five-year limited warranty
- Pros:
- Extremely thin and lightweight, ideal for portability
- Very fast data transfer speeds for an external drive
- Durable metal casing provides good protection
- Broad compatibility with various devices
- Cons:
- Not as rugged as the Armor 700 for extreme environments
- Max speed requires USB 3.2 Gen 2×2 port
- User Impressions: Many users are impressed by its slim profile and how easily it slips into a pocket or bag. The speed is a frequent highlight, making it a favorite for quickly moving large video files or game installations. It’s considered a stylish and efficient portable storage solution.
- See it on Amazon here
6. Lexar 4TB NM1090 PRO PCIe Gen5 NVMe M.2 2280 Internal

For the absolute bleeding edge of performance, the Lexar NM1090 PRO is a next-generation M.2 2280 NVMe SSD. If your Legion laptop (or desktop setup) supports PCIe Gen5, this drive offers mind-blowing speeds that will redefine “fast.” It’s not just about gaming; this drive is an AI PC powerhouse, dramatically accelerating everything from data processing to content creation. This is the ultimate speed demon.
- Key Features:
- PCIe 5.0 technology delivers blistering read/write speeds up to 14,000/13,000 MB/s
- Accelerates load times by 200% – great with AMD Ryzen and Intel i9
- Powerful 6nm controller optimizes heat control
- Perfect internal SSD for AI PCs: reduces bottlenecks and accelerates AI tasks
- DRAM Cache and SLC Dynamic Cache greatly enhance data transfer speeds
- Works with Microsoft DirectStorage to significantly boost game loads
- Pros:
- Unrivaled PCIe Gen5 speeds for extreme performance
- Ideal for future-proofing your Legion (if it has Gen5 support)
- Significantly boosts game loading and AI processing
- Advanced thermal management for consistent performance
- Cons:
- Requires a PCIe Gen5 compatible M.2 2280 slot (less common in current laptops)
- Premium price point due to cutting-edge technology
- Will need robust cooling in a laptop environment.
- User Impressions: Early adopters are astonished by the raw speed, comparing it to “instantaneous” operations. Creators and power users note the dramatic reduction in processing times. It’s recognized as a top-tier investment for the most demanding systems.
- See it on Amazon here
7. Crucial P310 4TB SSD, PCIe Gen4 NVMe M.2 2280

While we’re focusing on Lexar, this Crucial P310 offers a compelling alternative for Legion users seeking a reliable 4TB PCIe Gen4 NVMe M.2 2280 drive. Delivering excellent read/write speeds, it’s a strong performer for everything from quick bootups to smooth multitasking and game loading. Crucial, a brand known for its memory, provides a trusted solution backed by Micron quality.
- Key Features:
- PCIe 4.0 Performance: Up to 7,100 MB/s read and 6,000 MB/s write speeds
- Spacious 4TB SSD for AAA games, apps, and media
- Broad Compatibility: Works with laptops, desktops, and select gaming consoles (e.g., ROG Ally X, Lenovo Legion Go, AYANEO Kun)
- Backward compatible with PCIe Gen3 systems
- Up to 2x faster than previous Gen3 generation
- Built with advanced G8 NAND and thermal control
- Pros:
- Excellent Gen4 performance for everyday use and gaming
- Trusted Micron quality and reliability
- Broad compatibility, including some handheld gaming devices
- Good value for a 4TB PCIe Gen4 SSD
- Cons:
- Performance might not reach the absolute peak of some Gen4 competitors
- Does not include a heatsink (might need separate purchase depending on use)
- User Impressions: Users frequently praise its reliable performance and the noticeable speed upgrade from older drives. Many appreciate Crucial’s reputation for quality. It’s considered a solid, no-frills, high-capacity internal SSD.
- See it on Amazon here
8. Lexar SL600 USB 3.2 Type-C Portable External SSD – 4TB

The Lexar SL600 is another fantastic portable option, offering the same incredible 2000MB/s speeds as the Armor 700 and SL500 but in a slightly different form factor. Its sleek, graphite gray design and compact size make it perfect for slipping into your bag, giving your Legion access to a huge 4TB of high-speed storage wherever you go. It’s designed for efficiency and convenience without compromising on speed or capacity.
- Key Features:
- Incredible speed: Up to 2000MB/s read and 2000MB/s write speeds via USB 3.2 Gen 2×2
- Ample 4TB storage capacity (also available in 1TB, 2TB)
- Rugged durability: Shock and vibration-resistant
- Compact & portable: 4.43 x 2.32 x 0.41 inches; 2.25 oz
- Universal compatibility: Mac OSX, Windows, Android
- Includes USB Type-C and Type-A cables
- Pros:
- Blazing-fast portable speeds for demanding tasks
- Good physical durability against everyday bumps
- Extremely lightweight and compact
- Excellent cross-platform compatibility
- Cons:
- Not as intensely rugged as the Armor 700 for extreme outdoor use
- Optimal speeds require a compatible USB 3.2 Gen 2×2 port
- User Impressions: Users are impressed by its balance of speed, capacity, and portability. It’s often chosen for transferring large video files or as an external game drive. Many appreciate the included cables for broad compatibility.
- See it on Amazon here
9. Lexar 2TB Professional Go Portable SSD w/Hub

While our main focus is on 4TB, this Lexar Professional Go Portable SSD is a unique and highly versatile 2TB option that deserves a mention for Legion users who might prioritize connectivity on the go. Not only is it a fast portable SSD, but it also cleverly integrates a hub with four USB Type-C ports. This makes it a fantastic tool for creators and professionals needing both storage and expanded connectivity for their laptop, camera, and other devices.
- Key Features:
- Ultra-compact design for portability
- Wireless plug-and-play Type-C connector (press firmly to insert)
- Capture Apple ProRes footage effortlessly
- Integrated hub with four USB Type-C ports, plus adapters/cables
- Blazing-fast performance up to 1050MB/s read and 1000MB/s write
- Ready for travel: dust-proof and water-resistant (IP65), drop-resistant up to 1 meter
- Five-year limited warranty
- Pros:
- Unique integrated USB hub for expanded connectivity
- Excellent for creative professionals and mobile setups
- Good speeds for portable 4K recording and backups
- Rugged and durable for travel
- Cons:
- Only 2TB capacity (not 4TB)
- “Wireless” refers to direct plug-in without a cable, not Wi-Fi
- Speed is lower than Gen 2×2 portable SSDs
- User Impressions: Users are thrilled with the hub functionality, calling it a “game-changer” for fieldwork and travel. The compact size and ruggedness are highly valued. It’s seen as an innovative solution for multi-device workflows.
- See it on Amazon here
10. Lexar 2TB Armor 700 Portable SSD, Up to 2000MB/s, USB

Rounding out our list is another variant of the Lexar Armor 700, this time in a 2TB capacity. If you love the extreme ruggedness and blistering speeds of the 4TB Armor 700 but don’t quite need the full 4TB, this 2TB version offers all the same fantastic features in a slightly more affordable package. It’s perfect for a smaller, but still robust, external game library or critical project backups for your Legion.
- Key Features:
- Blazing-fast USB 3.2 Gen 2×2 performance of 2000MB/s max read/write speeds
- Rated IP66 for water and dust protection
- Rugged design withstands up to 3-meter drops
- Supports Apple Pro Res recording (iPhone 15 Pro/Max)
- Unique Thermal Control Design ensures optimal temperatures
- Compatible with PC, Mac, Android, cameras, gaming consoles, etc.
- Includes Lexar DataShield 256-bit AES encryption
- Includes a Type-C and USB-A all-in-one cable
- Five-year limited warranty
- Pros:
- Extreme durability and weather resistance
- Very high portable speeds for efficient transfers
- Excellent for active users and outdoor professionals
- Hardware-based encryption for data security
- Cons:
- Only 2TB capacity (not 4TB as per the main keyword focus)
- Requires a USB 3.2 Gen 2×2 port for full speed
- User Impressions: Similar to the 4TB version, users praise its “tank-like” build and impressive transfer speeds. It’s highly recommended for anyone needing robust, fast, and secure external storage, especially if 4TB isn’t a strict requirement.
- See it on Amazon here
Frequently Asked Questions (FAQ)
Q1: What does “M.2 2242” mean, and why is it important for my Legion?
A1: M.2 refers to a form factor for internally mounted expansion cards, like SSDs. The numbers “2242” denote its physical dimensions: 22mm wide and 42mm long. This is crucial because some specific Legion models, especially certain handhelds like the original Legion Go, or older, compact laptops, might only have a slot designed for this shorter 2242 SSD. Most modern gaming laptops, however, use the larger 2280 (22mm wide, 80mm long) form factor. You cannot fit a 2280 SSD into a 2242 slot, or vice versa, without physical modification.
Q2: Why is it difficult to find a Lexar best 4TB SSD 2242 for Legion specifically?
A2: Finding a 4TB 2242 SSD, particularly from Lexar, is challenging because the 2242 form factor is quite small. Packing 4TB of NAND flash memory into such a compact space while maintaining performance and thermal efficiency is difficult and often costly for manufacturers. The market demand for high-capacity 2242 drives is also lower compared to 2280, leading to fewer options.
Q3: Can I use a portable SSD for gaming on my Legion laptop?
A3: Yes, absolutely! Portable SSDs like the Lexar Armor 700 or SL500, with their high USB 3.2 Gen 2×2 speeds, are fantastic for storing and even running games. While an internal NVMe SSD will generally offer slightly faster load times, a high-speed portable SSD is perfect for expanding your game library without opening your laptop, or for quickly transferring large game files between devices.
Q4: What’s the main difference between PCIe Gen 4 and Gen 5 NVMe SSDs, and do I need Gen 5 for my Legion?
A4: The main difference is speed. PCIe Gen 5 NVMe SSDs double the theoretical bandwidth of Gen 4 (e.g., up to 14,000 MB/s vs. 7,000 MB/s). Whether you “need” Gen 5 depends on your Legion model and usage. Most current Legion laptops support PCIe Gen 4, which is incredibly fast for gaming and everyday tasks. Gen 5 is cutting-edge and best suited for the most demanding workloads (like AI processing or extreme content creation) on systems explicitly designed to support it. For pure gaming, Gen 4 is still more than sufficient for excellent performance.
Q5: Do Lexar SSDs come with software for data migration or encryption?
A5: Many Lexar SSDs, especially their portable models, often include Lexar DataShield software for 256-bit AES encryption, helping to secure your files. For data migration, while Lexar doesn’t always bundle specific cloning software, their drives are compatible with popular third-party solutions (like Macrium Reflect or Clonezilla) that you can use to transfer your operating system and files to your new SSD.
Q6: Should I get an SSD with a heatsink for my Legion?
A6: For internal NVMe SSDs, especially high-performance PCIe Gen 4 or Gen 5 drives, a heatsink is highly recommended. These drives can generate significant heat under heavy loads, and a heatsink helps dissipate that heat, preventing thermal throttling (where the drive slows down to prevent overheating) and ensuring consistent top-tier performance. Some Legion laptops have adequate cooling, but a dedicated heatsink provides an extra layer of protection, particularly in tightly packed laptop chassis.
Q7: How do I know if my specific Legion laptop model supports a 2242 or 2280 SSD?
A7: The best way to check is to consult your Legion laptop’s official specifications or user manual. Look for “M.2 SSD slot” information. Many manufacturers also list compatible form factors. Alternatively, you can search online forums specific to your Legion model, where other users often share their upgrade experiences. When in doubt, physically opening your laptop (if you’re comfortable) can reveal the SSD slot and any mounting screws, which typically align with either 42mm, 60mm, or 80mm lengths.