Ext4-fs error Raspberry pi 4

have a look to cable and connections. Somehow you have quite some disk errors

As well you could look to kernel error messages

dmesg -l err,crit,alert,emerg

Ah the issue is on device sda2. Can you check who this is

lsblk -o name,fstype,label,size,ro,type,mountpoint,partuuid,uuid