there were tests for frost resistance, files were previously recorded on the flash drive, then the flash drive froze in the freezer to -23 * C, then quickly got it out and everything was played back and rewound on the computer without any delay, it works great! Its pros: 8GB for 220, I think it's not bad! Clarification of those characteristics: the write speed on the computer is the same on the front USB connectors, on the back (from the motherboard) within 4.0-4.2 m / s Some cons: when working in portable portable acoustics (Perfeo Musik Ball PF-MSI32) when the battery is fully charged, it works fine. But as soon as it discharges a little (the power supply voltage of the flash drive drops to about 3.7-3.8 V), then it turns off, (writes a disk error) Although all other flash drives work fine on this speaker.
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