“This microSD card is so fine that I have never encountered any read/write problem on this SD card. it smoothly run on my Raspberry-pi LInux heavy-duty customization, And it is very easy to expand the remain tracks besides of ROOT area.
During my customization work, I have encountered the strange symptom of "Black-Out screen" within the stage of Raspberry pi Linux "Updating". For a few minutes, I had no idea what was going-on during the 1st boot for installation/tuning. But, I felt that it may be required to run "sudo rpi-update " = TO GET THE LATEST FIRMWARE - before running the "SUDO APT-GET UPDATE DURING THE 1ST BOOT after POWER-ON".
I did the power-off and Power-on, watch its 1st boot, and temporally kill the process at the point of running for Raspberry Pi Linux tuning. After the running of "sudo rpi-update", I restart the ra,im of 1st boot work. Finally, I could complete the 1st boot running after 1st power-on.”
