Review on Lexar 256GB Professional 1667X UHS-II U3 V60 SDXC Memory Card - 2 Pack With Microfiber Cloth (512GB Total) by Bernard Her

I was curious as to why these cards initially felt stuck in and out of my camera and noticed a weird little sticker on them that wasn't on previous cards that said "Lexar, a subsidiary of the Chinese company Longsys. I did a test with the sdspeed app and found that all data was written and read, but the speed was much slower than my official card. Just for InfoLEGIT 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, 1 MB = 1000*1000 bytes, SI)2019.03.31 17 :17:22 - 8: Average read speed.: 57.51 MB/s THIS CARD E 31.03.2019 16:19:16 - 5: Average write speed. : 38.86 MB/s 03/31/2019 16:19:16 - 6: Min. Write speed (MB/s): 8.45 MB/s (megabytes per second, 1 MB = 1000*1000 bytes, SI)20 03/19/31 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