How to speed up Wipe External Hard Drive

Hello,

Given AOMEI Partition Assistant Standard Edition running on Windows 10, the estimate for Wiping an 8TB external Hard drive is 141 hours or 5.8 days for 2 pass, 211 hours or 8.7 days for 3 pass.  The hard drive only uses 23% of 8TB space.  Is there a way to speed up wiping down to one day for 3 pass? 

The benchmark from CrytalDiskMark indicates that the hard drive writing speed is 220MB/s.  That is, 12GB per minute.   That speed is fast enough.  How the speed slow down dramatically?     
  
I am sure this question has been asked before, but I just can't find the answer.   Thank you,
  

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