Mohammed Allam :
so i bought samsung evo 850 250gb and I have written so far 0.22 terabytes in the last 4 days, so what is the maximum data writes before it fails plz???
It's a TLC+Simulated SLC hybrid rated for about 3k writes, so ~750TB on average before cell degradation occurs.
However, USAFRet has it somewhat backwords. The SSD is likely to die due to controller/firmware faults or a secondary component failing on the PCB before it experiences NAND degradation.
The reality is that consumer SSD's have 0-5-2% annual failure rates during their warranty period and they rise exponentially after that just like with hard disks.
This is on par with hard drive failure rates 10 years ago, so the 50th percentile for SSD failure is probably between 5-7 years. if you continue to write to the drive at the rate you listed you should reach 750TB in 3500 days or about 10 years.
In other words, more likely than not this drive will fail with in 5-10 years of use regardless of what loads it's under.
USAFRet is right though about the capcity of the drive requiring you to upgrade within that time though. SSD's under 1TB will become obsolete in 5-10 years for sure.