What's, up? home server OS memory card seeing I/O errors

AIEEEE!!! Potential hiccups ahead for my master server, as today I started to observe these in dmesg output after rebooted my Raspberry Pi.

[  330.832267] I/O error, dev mmcblk0, sector 4296024 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2
[  340.025182] mmc0: Got data interrupt 0x00000002 even though no data operation was in progress.
[  348.220180] mmc0: Got data interrupt 0x00000002 even though no data operation was in progress.
[  356.785177] mmc0: Got data interrupt 0x00000002 even though no data operation was in progress.

Most of the stuff is being run from an external USB HDD but I guess I better go and buy a new memory card soon, as losing the main server OS would not be fun. I still have my Linux laptop running stand-by Zabbix in case something would go badly wrong.

Anyway, it looks like that the memory card that came with my Raspberry Pi 4 did last for about one and a half years.