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Niko233 wrote:

Thanks for info, but where is write caching appears if after inserting of Flash drive procedure was only Scan by NIS procedure?

I think NIS only reading files from device, and write procedure can be only in FAT zone, which is so fast (only deteting malware, if they was found on device)

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Hi Niko233,

These are standard troubleshooting procedures intended to help narrow down the problem. So I would still recommend running chkdsk /r and check the caching on the USB flash drive.

Best wishes.

Allen