SD Card Read Only

Hi, I have installed Hassio on a Rpi 3b and all is running fine, did my snapshots, unfortunately not on a USB, and suddenly after the update to Hassio 3.9 and HA 105 the system was not visible anymore on the webpages???

I took the SD card to get the latest snaphot of the card however learning that again the SD card is made read only…
I understand by checking forums that linux is making cards read only as security measure?
I tried to get rid of the read only state, however no way to do so…

What is the best way to prevent this as my system is running Rpi3b and a 3A power supply and crashed multiple times a costed several sd cards already?