According to the file you attached with logs, we can determine the Minimum erase cycles are 272 and the Maximum erase cycles 343, that gives you an average erase cycles of 306, that is why the wear leveling count is at 89%.
We can also check, there is something in the system that keeps writing data in your SSD, the Host Bytes Written are around 100TB, you can check this link: http://www.intel.com/content/dam/www/public/us/en/documents/product-specifications/ssd-750-spec.pdf on page 11 for the information about the endurance rating, which is 70GB per day.
Let us know if you have more questions about it.
Thank you for helping me interpret the "Host Bytes Written" attribute. Can you explain how the value "3849994" corresponds to ~100TB written?
With that knowledge, I used Windows's Resource Monitor to watch disk activity and found that MSI's motherboard control software ("MSI Command Center 220.127.116.11") has been writing roughly 350 MB/sec, continuously, at all times. All it's supposed to do is monitor fan speeds and CPU temperature.
My experiences with MSI products have been terrible, but so far they have all been resolved by RMA/replacement through MSI. This time, though, I'm on my own, because they damaged a totally separate component from a different vendor. I'm very frustrated, and I don't think there's anything I can do.
Thank you again for your help.
In order to get the value of Host Bytes Written it is very important to know the Host sectors written divided by 65536 (1 count = 32 MiB). This means the value you have in the Host Bytes Written needs to be multiply by 32, same happens with the Nand Bytes Written, after you get the result then you just divide by 1024 so you can get the GB value and once again divide by 1024 to get TB.
Please let us know if you require more assistance.