
Tianken Ultra Slim 750GB
Score: 70/100
Kosbees External HDD 500GB
Score: 57/100Rankings

The Tianken 750 GB Ultra Slim Portable HDD offers a thin, lightweight design with broad OS and console compatibility at a budget price. Performance is limited to typical 5400 RPM HDD speeds and it lacks advanced security or rugged features.

The Kosbees 500 GB portable HDD offers a slim, lightweight design with USB 3.0 performance and broad device compatibility, making it a budget-friendly option for gamers and students. It lacks hardware encryption and provides modest capacity, so it suits casual storage rather than high-security or high-capacity needs.
| Attribute | ![]() | ![]() |
|---|---|---|
750 GBbest | 500 GB | |
— | 120 MB/sbest | |
— | 103 MB/sbest | |
12 monthsbest | 12 monthsbest | |
| ↓ lower better | 0.198 kgbest | 0.231 kg |
| ↓ lower better | 80.01 mmbest | 81 mm |
| ↓ lower better | 15.75 mm | 14 mmbest |
| ↓ lower better | 128.52 mm | 119 mmbest |
Click an attribute name to sort · Green = best, red = worst (relative to this comparison)
| Attribute | ![]() | ![]() |
|---|---|---|
Performance(2) | ||
Sequential Read Speed (MB/s) | 80-120 MB/s | 120 MB/s |
Sequential Write Speed (MB/s) | 80-120 MB/s | 103 MB/s |
Compatibility(1) | ||
Operating System Compatibility | Windows, macOS, Linux, Chrome OS, Android, Xbox One, PS4, PS5 | exFAT |
Build & Design(4) | ||
Weight (kg) | 0.198 kg | 0.231 kg |
Width (mm) | 80.01 mm | 81 mm |
Height (mm) | 15.75 mm | 14 mm |
Depth (mm) | 128.52 mm | 119 mm |
Storage(1) | ||
Storage Capacity (GB) | 750 GB | 500 GB |

Products in the top-left offer the best value (high score, low price).

Professional reviewers would categorize the Tianken drive as a budget-tier external HDD, praising its low cost, thin profile and long warranty, but criticizing its lack of SSD performance, plastic construction and absence of security features, making it suitable for casual storage rather than demanding professional workflows.
Everyday users generally appreciate the drive's portability, ease of use and price, especially for gaming consoles and photo backups, while recurring frustrations revolve around the reduced usable capacity, the need to reformat for Mac, modest transfer speeds and concerns over the cheap plastic housing.

“Works perfectly with my PS4 and laptop.”

“Very thin and light - fits in my pocket.”

“Great value for the price.”




Professional reviewers note that the Kosbees drive delivers the expected performance of an entry-level 5400 RPM portable HDD, with solid build quality and a price-point that undercuts name-brand competitors. They praise its plug-and-play simplicity and console support, but criticize the lack of encryption, the need for Mac reformatting, and its limited suitability for high-end workloads.
Everyday users rate the drive highly for its lightweight feel, ease of use on Windows, and reliable game storage on PS4/Xbox One. Common complaints involve the capacity display mismatch, the requirement to reformat for macOS, warmth during prolonged use, and the absence of accessories or backup software.