Read only file system error

I’m running pi hole using one of the subblied raspbian images from this site, I’m using a normal SD card as my boot drive (brand new, it came today,so did my le potatoe)

And it’ll run fine and then if I give it a while it’ll suddenly die and when I go onto the pi hole web interface I’ll be greeted with error codes saying it is a read only file system

Where am I going wrong? Why is it doing this randomly? … I mean restarted it (unplugging and plugging back in) fixes it … but I don’t want to keep going into my attic to do that

The system goes into read only mode when there is corruption detected on the storage device to prevent additional transparent silent damage. What MicroSD card did you purchase?