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Choose an external SSD for faster transfers, quiet operation, and frequent travel. Choose an external HDD when you want to store more data for less money and do not need to access it as often. For important files, either drive should be one copy in a backup plan—not the only copy.
How HDDs and SSDs store data
External HDDs use magnetic platters
A hard disk drive (HDD) reads and writes data on magnetic platters with moving mechanical parts. That design makes HDDs a cost-effective choice for storing large amounts of data, but it can also make them noisy and more vulnerable to drops or jostling while in use.
External SSDs use flash memory
A solid-state drive (SSD) stores data in NAND flash and has no moving parts. This enables faster access and makes an SSD more resistant to physical shock than a mechanical HDD. It does not make an SSD indestructible: a model’s specific drop or water-resistance rating, if any, must be checked separately.
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Which type is better for your priorities?
| Priority | Better starting point | Why |
|---|---|---|
| Large capacity for less money | External HDD | HDDs are positioned as a cost-effective option for storing large amounts of data. SSDs carry a premium for performance, according to Western Digital. |
| Frequent large transfers or active files | External SSD | SSDs offer higher performance and lower latency, subject to the drive, connection, and host device. |
| Frequent travel or handling | External SSD | With no moving parts, SSDs are more shock resistant than portable HDDs. |
| Quiet operation | External SSD | Mechanical HDDs can make noise; SSDs have no moving parts. |
| Another copy of important files | Either type | Both can fail. A second drive can hold another copy, but should not be the only protection for important data. |
Speed depends on the whole connection
SSDs are the speed choice, but a technology’s headline speed is not a promise about a particular portable drive. In a December 2023 comparison, Kingston Technology said the fastest commercially available HDDs offered speeds around 160 MB/s and entry-level SSDs were typically more than three times faster. Kingston also listed SATA SSD speeds above 500 MB/s and top NVMe drives up to 7,000 MB/s. These are vendor-published technology-level figures, not guaranteed external-drive results.
#1 Best Overall
- Get NVMe solid state performance with up to 1050MB/s read and 1000MB/s write speeds in a portable, high-capacity drive(1) (Based on internal testing; performance may be lower depending on host device & other factors. 1MB=1,000,000 bytes.)
- Up to 3-meter drop protection and IP65 water and dust resistance mean this tough drive can take a beating(3) (Previously rated for 2-meter drop protection and IP55 rating. Now qualified for the higher, stated specs.)
- Use the handy carabiner loop to secure it to your belt loop or backpack for extra peace of mind.
- Help keep private content private with the included password protection featuring 256‐bit AES hardware encryption.(3)
- Easily manage files and automatically free up space with the SanDisk Memory Zone app.(5). Non-Operating Temperature -20°C to 85°C
The external drive’s own interface and the port and capabilities of the computer or other host device can limit the speed you actually reach. Check the product’s stated speed and confirm that your host has a compatible connection before choosing based on performance. Kingston’s comparison and Seagate’s overview both discuss how interface and storage technology affect performance.
Cost and capacity: favor the workload, not a blanket price claim
For a large archive, media library, or infrequently accessed files, an external HDD is often the practical starting point because HDDs are positioned for capacity at lower cost per gigabyte. For active projects, frequent transfers, or files you need to open quickly, paying more for an SSD’s performance may make sense. Exact prices and capacities vary by product and change over time, so compare current models at the capacity you need rather than relying on a fixed HDD-versus-SSD price rule.
Rank #2
- Solid state performance with up to 800MB/s read speeds in a portable drive. (Based on internal testing; performance may be lower depending on host device, interface, usage conditions and other factors. 1MB=1,000,000 bytes.)
- Back up your content and memories on a storage solution that fits seamlessly into your mobile lifestyle.
- Take it with you on your adventures—up to two-meter drop protection means this durable drive can take a beating. (Based on internal testing.)
- Secure it to your belt loop or backpack for extra peace of mind thanks to the tough rubber hook.
- From Sandisk, a brand professional photographers trust to take on assignments.
Portability and durability have limits
An SSD’s lack of moving parts makes it more resistant to shock than an HDD, an advantage when a drive is carried between locations. Kingston notes that portable HDDs may be dropped or jostled in transit or during ordinary use. That is a relative advantage, not a guarantee against damage: use a protective case if appropriate, handle either drive carefully, and check the individual product’s ratings rather than assuming all external SSDs are rugged or waterproof.
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SSDs have finite write endurance, commonly expressed as TBW, or terabytes written. Kingston says wear-leveling and over-provisioning help mitigate flash wear. HDDs have mechanical failure modes. There is no universal lifespan winner established by these facts, and neither technology eliminates the risk of losing data. Keep another copy of important files on a separate device or in another location.
Quick Recap
Best Value
- MADE FOR THE MAKERS: Create; Explore; Store; The T7 Portable SSD delivers fast speeds and durable features to back up any endeavor; Build your video editing empire, file your photographs or back up your blogs all in an instant
- SHARE IDEAS IN A FLASH: Don’t waste a second waiting and spend more time doing; The T7 is embedded with PCIe NVMe technology that brings fast read and write speeds up to 1,050/1,000 MB/s¹, making it almost twice as fast as the T5
- ALWAYS MAKE THE SAVE: Compact design with massive capacity; With capacities up to 4TB, save exactly what you need to your drive – from large working files to game data and everything in between
- ADAPTS TO EVERY NEED: Whether using a PC or mobile phone, count on the T7 for extensive compatibility²; It’s a true team player when it comes to heavy-duty application usage or file-saving
- HI RESOLUTION VIDEO RECORDING: Record Ultra High Resolution (4K 60fs) videos directly onto the T7 Portable SSD with your favorite camera or mobile devices; Supports iPhone 15 Pro Res 4K at 60fps video and more³
Rank #4
- Easily store and access 2TB to content on the go with the Seagate Portable Drive, a USB external hard drive
- Designed to work with Windows or Mac computers, this external hard drive makes backup a snap just drag and drop
- To get set up, connect the portable hard drive to a computer for automatic recognition no software required
- This USB drive provides plug and play simplicity with the included 18 inch USB 3.0 cable
- The available storage capacity may vary.
Rank #3
- Capacity Display Variance: 500GB external ssd often appears as around 465GB on Windows. MacOS can show full 500 GB capacity. This is binary calculation difference and doesn’t affect SSD hard drive actual physical storage
- 1050 MB/s Speed: Instantly access to your files with blazing-fast 10Gbps external SSD read up to 1050MB/s and write up to 1000MB/s. LED Light indicates USB SSD instant activity
- Data Security: Solid state drives S.M.A.R.T. health diagnostics and adaptive TRIM optimizing data block management ensures consistent write speeds and extends the longevity of the portable SSD
- USB-C & USB-A Cable: Both cables featuring rapid USB 3.2 Gen2, this USB SSD effortlessly bridges devices, enabling seamless cross-platform file transfers and backup between computers, smartphones, tablets and iPhone
- Always Fast: No slowdowns for large file transfers. With SLC caching (25% of current available capacity allocated as high-speed cache), this external SSD delivers steady 10Gbps for transfers within the cache capacity
Check compatibility before buying or reusing a drive
- Match the connection: Confirm the drive’s interface works with the computer, console, or other host you plan to use, and remember that the connection can cap transfer speed.
- Check the drive’s actual specifications: Do not assume every SSD reaches SATA or NVMe technology-level figures; use the stated speed for the specific external model.
- For an internal SSD in an enclosure: Confirm that the enclosure supports the SSD’s interface. Kingston also cautions that settings such as an ATA password can make an SSD inaccessible through an external enclosure. See Kingston’s enclosure guidance.
- For a portable drive: Check any model-specific drop or water-resistance rating instead of treating shock resistance as a guarantee.
A quick decision
- Pick an external HDD if your main goal is storing a large volume of files for less money and you access them less often.
- Pick an external SSD if you frequently move large files, work directly from the drive, value quiet operation, or carry it around regularly.
- For important data, keep another copy regardless of which drive type you choose.
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
