These discs are made in Korea, China and Thailand. I came across a copy made in Korea on 01/12/2022 (written on the side of the box and on the disc itself). The read speed is declared 560, and the write speed is 530. I ran the disk several times in CrystalDiskMark and got values of 564 and 535, which turned out to be slightly more than declared. The 4k read speed was also impressive. I am attaching the screenshot of the test. I am satisfied with the purchase!
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