I’m afraid I never got to the bottom of this. Many folk claimed “I’ve been using good quality SD cards, with a 2500mA PSU for 3 years and never had a moment of trouble.” Many others claimed “Yeah, I found Home Assistant killed my SD cards, too.”
Shortly after this post, I quit using HassIO and installed Home Assistant on an old refurbished Linux notebook. Its a minor pain, but a good learning experience, installing the individual components. The only thing is I haven’t got Configurator to auto-run (but that’s my inexperience with Linux). I don’t even miss the plug-ins.
Same problem here recently. Things overall have been pretty stable. This is the first encounter of this error. Not sure I’m convinced it’s the SD card. Would an SD card fail in this same manner for everyone? Doubtful to me, but I’m not claiming to be an expert.
On consideration (and having had my HA running perfectly on a netbook since my original post) I strongly believe this was something to do with the logging file. I’ve noticed that mine grows by about 100Mb per DAY! It’s not really an awful lot, but maybe the flash card was taking a pounding.