[sunseb]

What about a Industrial SLC SD Card ? Like that:

https://swissbit.com/products/nand-flash-products/cards/sd-m...

Is it safe for backup or same problem?

[DanielDent]

My understanding is that SLC is seen as safer, and lower densities are also seen as safer. Beyond that I don't know for sure.

I imagine that even an "industrial" grade flash card is still engineered with the assumption that it will be turned on for a while every now and then.