@wolfie1968 Unsafe shutdowns can result in data corruption, In my experience I had a few sd cards go bad on me even though Ive been careful about handling them and doing safe shutdowns. so it can be the quality of the sd cards you are using. Which type of sd card are you using? I tend to use Samsung's Evo Select cards.

If you do your research on file systems some of them are documented to be more resilient to data loss/ data corruption.