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   In a post between "Dave Drum : August Abolins", on 9/12/2019 3:49 AM   
      
    > I've no direct experience with degradation of SD cards - micro or std.   
   >   
   > But, I've had lost data/corrupted data on nearly everything else. Heat,   
   > bright light and cosmic rays seem to play some role. I've even had CDs   
   > and DVDs get trashy parts on me.   
      
   Are those your own burned CDs or DVDs?   My commercial CD collection from when   
   I first started buying those things in the 80s, still play beautifully.   
      
      
   > Having been bitten more than once I've adopted a practice of copying   
   > "important" files onto a separate device/medium then use a file comparison   
   > utility to check the result.   
      
   copy /v  ..very handy.   
      
   But doesn't the traditional gui drag-drop process automatically do a verify?   
      
      
   > .. Amiga made it possible. Commodore made it dead.   
      
   Which reminds me, I have a wonderful Commodore calculator, SR-9190R.  I got it   
   at a Consumer's Distibuting in the late 70's for about $50, new.  It    
   essentially replaced my $400+ Texas Instruments programmable calculator just a   
   few short years prior to that.  But the Commodore has the best keys and is the   
   only one that still works!   
      
   --- Thunderbird 2.0.0.24 (Windows/20100228)   
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