I was curious as to why these cards were initially difficult to slide in and out of my camera and noticed an odd little sticker on them that wasn't there before. earlier cards read: "Lexar, a subsidiary of Longsys, a Chinese company. I did a test with the sdspeed app and found that all data was written/read but the speed was much slower than my known official card. Just fyiLEGIT CARD2019.03.31 17:17:22 - 5: Average write speed.: 43.92 MB/s2019.03.31 17:17:22 - 6: Minimum write speed (MB/s): 7.99 MB/s (megabytes per second , 1MB = 1000*1000 bytes, SI)2019.03.31 17:17:22 - 7: Maximum write speed (MB/s): 76.97 MB/s (megabytes per second, 1MB = 1000*1000 bytes, SI) 2019.03 .31 17:17:22 - 8: Average reading speed. : 57.51 MB/s THIS CARD 03/31/2019 16:19:16 - 5: Average write speed. : 38.86 MB/s 2019.03.31 16:19:16 - 6 : Minimum write speed (MB/s) : 8.45 MB/s (MB/s r seconds, 1 MB = 1000 * 1000 bytes, SI ) 2019.03.31 16:19:16 - 7: Maximum write speed (MB/s). : 56.98 MB/s (megabytes per second, 1 MB = 1000*1000 bytes, SI) 03/2019 16:19:16 - 8: Average read speed. : 9.47MB/s
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