Raspberry Pi 4 - micro sd boot failure

What is your power supply ? The Pi 4 is more power hungry than the Raspberry Pi 3. A overloaded PS can eat SD cards.

Added:

vcgencmd get_throttled

This command works with the Pi OS, not sure about Ubuntu. It will tell you if your Pi has experienced an under voltage.

output interp


Code

111100000000000001010
|||| ||||_ under-voltage
|||| |||_ currently throttled
|||| ||_ arm frequency capped
|||| |_ soft temperature reached
||||_ under-voltage has occurred since last reboot
|||_ throttling has occurred since last reboot
||_ arm frequency capped has occurred since last reboot
|_ soft temperature reached since last reboot

Thanks for the replies

this is the power supply - LINK /

This is the sd card - both were the same LINK

For shutdown I have pulled power from it before, but did not do that between the time of it working and when it stopped. I'm using it as a plex / file server that's always on, but couldn't connect to it one day and that's when I started troubleshooting.

I will try to run the power commands.

And the USB ports are limited to 1.2a total for all 4 if he has other stuff plugged into them.

I have not got into them yet but I am going to boot mine off cheap SSDs for more stability and speed. Kingston A400 because they are thinner than the SP A55's I tried. They also use less power than the SPs but both are not too hungry. I have a new uctronics pi rack that has a ssd sled, screen, soft shutdown power button that makes it a all in one package. Putting power to the sled and it powers the rest.