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Type any character to start FreeStack: 14444 Type is FAT32 Card size: 8.03 GB (GB = 1E9 bytes) Manufacturer ID: 0X1B OEM ID: SM Product: 00000 Version: 1.0 Serial number: 0X8D172C54 Manufacturing date: 1/2015 File size 5 MB Buffer size 512 bytes Starting write test, please wait. write speed and latency speed,max,min,avg KB/Sec,usec,usec,usec 3528.36,22171,135,143 3654.74,7632,135,138 Starting read test, please wait. read speed and latency speed,max,min,avg KB/Sec,usec,usec,usec 3280.63,1512,154,154 3282.78,1429,154,154 Done Type any character to start
BTW, BillG did 20MB/sec rd/wr with SDIO on Teensy 3.6 with the newest SdFat-beta..