A few days ago, I installed a new openHABian instance on a PiZeroW, just two Sensors.
I used a used 16 GB SD Card not a No-Name Card. This card wasn’t also in use for long. The SD Card was also just 13% full.
This was the sensor result:
After a reboot it worked for some time, and then system just stopped fetching sensor data.
I could login without problems and the system was completely usable, it just stopped receiving data.
I think this is the usual SD Card worn out problem, writes do not work anymore, but no errors.
The question is, could i use the SD Card again, with a different image, for sure only for a testing device?
Or is it most likely to hit the problem all the time? Even with testing i don’t want spend much extra time because of a 10 € SD Card.
I am using SD Cards & Pis for a few years, mostly Kodi, and this is the first problem like this. And i guess i will hit this problem more often from now on. 
So i am looking for a strategy with the help from people who have more experience with this:
- Keep Card, for testing a new image it is ok
- Directly to the bin, not worth it
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Thanks for your input,
Joachim