What hard drive purchase makes sense today, Sept. 2021?  For me, it is 18TB Seagate Exos, w 5yr warranty.  Amazon $400.  ($22/tb)   Shucked drives?  Currently I am seeing no bargains.  Back in July Aug. 2021 Costco had Seagate 8TB for for $130  ($16/tb).  Now everywhere seems to be $170 ($21/tb).  No warranty when shucked.   Internal w 2 to 3 yr warranty: Also currently 8TB for $170  ($21/tb).   Why do I prefer to pay $22/tb for an 18TB vs waiting for an 8TB sa