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After a year and a half of usage, on a 2-TB SSD:

  Percentage Used:                    2%
  Data Units Read:                    1,118,827,429 [572 TB]
  Data Units Written:                 432,707,145 [221 TB]
  Power Cycles:                       484
  Power On Hours:                     1,106
The power-on hours, during which the read-write activity happened, correspond to only 46 days, because the rest of the time the SSD was presumably powered-down by the OS, due to inactivity.



Just over 2 years on a 500GB M1 mac

   Percentage Used:                    14%
   Data Units Read:                    1,101,421,696 [563 TB]
   Data Units Written:                 902,660,422 [462 TB]
   Power Cycles:                       238
   Power On Hours:                     2,489
Assuming the %age used is even close to accurate, I'll be upgrading to a new device long before the disk craps out.




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