
Silicon Power
The Silicon Power SP128GBUF3B02V1K is a 128 GB USB flash drive with a slim black plastic chassis, weighing only 8 g and measuring 60.6 × 18.0 × 8.1 mm. It uses a USB 3.2 Gen 1x1 interface delivering up to 5 Gbit/s and achieves sequential read speeds around 210 MB/s and write speeds near 130 MB/s, making it suitable for bulk data transfers.
Pros
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Cons
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Expert Opinion
Professional benchmark testing (SSD‑Tester) shows the drive excels at large‑file sequential transfers, reaching up to 219 MB/s read and 135 MB/s write, but its random I/O performance is abysmal, with 4 KB write speeds under 1 MB/s and no measurable multi‑threaded throughput, limiting its usefulness to simple backup or media‑shuttle tasks.
How It Compares
Compared with other 128 GB USB 3.2 Gen 1 drives, the SP128GBUF3B02V1K offers typical sequential speeds but falls behind on random performance, where many competitors achieve several megabytes per second. Its ultra‑slim profile and 8 g weight are advantages, but the lack of encryption and endurance specs make it a basic, budget‑oriented option.