UnionSine Desktop External Hard Drive 16TB USB3.2Gen2 Type-C 3.5" HDD Storage Compatible for PC, Mac, TV, Desktop, Laptop(Black) HD3510
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30-day refund/replacement
To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.
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Availability:
Unavailable
Capacity: 16TB
Features
- Large Capacity: Vertical external hard drive does not take up space, high-speed transfer speed is easily used for PC office, 4K video image storage, TV recording and game storage
- Technical Support: With the support of MTC multi-layer caching technology, this mechanical hard drive can load applications/files faster, and provide better reading writing performance. Theoretical read speed up to 160MB/s and write speed up to 110MB/s
- System Compatibility: Using USB-C 3.2 Gen2 type-C high-speed interface motherboard, compatible with TV/Windows/Mac/Linux/DVD/Android, 4K TV recording, multi-brand TV
- Safety: To optimize the current transfer efficiency, the cable has been upgraded to 22 AWG thick copper core. Internal use of anti-vibration silicon, fast heat dissipation, reduce noise
- Accessories Content: Please Note, before connecting USB, please connect the power supply. Additional power supply, 1.2 m data cable, manual
Digital Storage Capacity: 16 TB
Hard Disk Interface: USB 2.0/3.0
Connectivity Technology: USB
Brand: UnionSine
Special Feature: Portable, Shock Resistant
Hard Disk Form Factor: 3.5 Inches
Hard Disk Description: Mechanical Hard Disk
Compatible Devices: Laptop, Gaming Console, Desktop, Television, Tablet
Installation Type: External Hard Drive
Color: Black
Hard Drive: 16 TB Mechanical Hard Disk
Brand: UnionSine
Series: HD3510
Item model number: HD3510
Item Weight: 2.07 pounds
Product Dimensions: 6.7 x 5.5 x 1.8 inches
Item Dimensions LxWxH: 6.7 x 5.5 x 1.8 inches
Color: Black
Hard Drive Interface: USB 2.0/3.0
Hard Drive Rotational Speed: 5400 RPM
Power Source: AC
Manufacturer: UnionSine
Country of Origin: China
Date First Available: July 27, 2022
Frequently asked questions
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Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Capacity: 1 tb
This external hard drive was exactly what I needed—compact, easy to use, and fast. No setup was required; I just plugged it in, and it was ready to go. The transfer speeds are great, and it works seamlessly with my laptop and gaming console. The ultra-slim design is a nice touch, making it easy to carry around without taking up space. It’s been perfect for storing extra files, games, and backups without any hassle. If you need extra storage without complications, this is a solid choice!
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Reviewed in the United States on March 22, 2025 by Tristan Knapp
Capacity: 14TB
I didn't have any issues using this drive for the purpose of helping migrate terabytes of data from my media server to a new system. It reads and writes about par for the course as most budget USB 3.0 HDDs will these days so I don't have any complaints with it's speed. That being said, there's one potential red flag for this drive that would prevent me from using it as permanent mass storage: the default formatting. This drive is formatted in exFAT, which is handy since it's plug and play with both Mac and Windows machines so it's particularly useful if you regularly transfer data between the two like I did, but it's an unreliable and less secure format compared to NTFS, HFS+, or APFS since it isn't journaled. My advice to anybody buying this drive who plans on using it with just one system - format it for that respective system. You'll be glad doing so, knowing you just averted the risk of data loss from accidental unplugs or power failures. Even then, you'd be better off using a third-party driver like NTFS for Mac or HFS+ for Windows. Beyond that, I think it's fine - especially for the price.
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Reviewed in the United States on April 10, 2025 by YALE70
I recently purchased the UnionSine 10TB Desktop External Hard Drive, and I have to say, it has significantly exceeded my expectations given its very affordable price point. I have been using it consistently for about a week and managed to back up around 1TB of data from another portable hard drive without any issues. The performance, convenience, and features of this product stand out, making it a strong competitor to more well-known brands like Seagate and WD. The overall design of this hard drive is sleek, professional, and well-considered. While it requires an external power adapter, I find the long cord to be a thoughtful touch that prevents any inconvenience. Unlike many other products that often limit user mobility, the extra length of the adapter cable ensures flexible placement. The package also includes two cables—a USB-C to USB-A and a USB-C to USB-C—which is particularly valuable for compatibility with both older laptops and newer devices such as my Lenovo and MacBook. This USB-C to USB-C cable is a great addition, offering a level of versatility and modern compatibility that many competing models, like Seagate and WD, do not provide. Furthermore, the ease of replacing USB-C cables, as compared to micro USB-A cables used by some other brands, adds another layer of convenience and practicality. The longer cables also offer greater flexibility, which I appreciate and consider a key highlight of this product. From a usability perspective, the drive arrived preformatted in the exFAT file system, which meant it worked seamlessly across both PC and Mac systems right out of the box—another thoughtful feature that minimizes setup hassles. In terms of data transfer speed, the UnionSine drive impresses with approximately 100 MB/s copy speeds from my old seagate USB external hard drive. While this speed is on par with my Seagate and WD devices, I found the writing process to be smoother and without any noticeable slowdowns. It consistently handled transfers with ease, regardless of large files or many small files (like photos), making file management fast and efficient. During my use, I did notice that the hard drive occasionally emitted a bit of loud noise, likely from the hard disk itself. However, this was not particularly disruptive and did not hinder my overall experience. The cooling fan noise, in contrast, was negligible, and the drive remained cool to the touch even after extended use of two to three hours. This heat management and quiet operation are reassuring features, especially when dealing with significant data backups or transfers. While I cannot yet speak to the long-term reliability of the UnionSine hard drive due to my short period of use, my experience so far has been overwhelmingly positive. It has delivered performance on par with, if not better than, my Seagate and WD external hard drives with more established brand reputation. Considering that this is my first experience with this less well-known brand, I am genuinely impressed and highly satisfied with its performance, design, and thoughtful features.
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Reviewed in the United States on November 11, 2024 by Booth Booth
Capacity: 14TB
Definitely worth the buy. It’s a great product for a good price. It’s small, compact, and super easy to use with plenty of space for all your PC stuff. The delivery was faster than I thought, and it works perfectly for what I need. I’d definitely recommend it. It worked so well, I ended up backing up photos and videos from all my old cameras, phones, laptops, and desktops too. And there’s still a lot of free space on the Seagate. Every device I plugged it into recognized it instantly and was good to go. The transfer speed is awesome. I’m really impressed. The only downside is the included USB cable feels a bit flimsy, especially the Micro B end that plugs into the drive. But overall, the speed is great, it wasn’t too expensive, and it’s good quality with a nice compact design. I’d recommend it if you need a portable drive with a lot of storage.
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Reviewed in the United States on November 27, 2024 by bect TY
Capacity: 1 tb
Hard drives are way expensive and I don't see why they can't be cheaper. In fact they can be cheaper and still work great, and this drive is proof of it! Plug and play, quick file transfers, very little noise. Very happy with it.
Reviewed in the United States on April 14, 2025 by Skye S.
Capacity: 12TB
I was disappointed to find no on/off switch. So I have to unplug to turn it off. I got the 12 TB model and it took several days to load up with data. So the write speed was very slow using USB 3.0 interface. The read speed was much much faster. So it works fine for streaming videos and other reading data. It seems to be very well built and well cooled, and I have not noticed any of the loud noise that I have seen in other reviews.
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Reviewed in the United States on January 23, 2025 by Toby Norris