Coverage Calculation can be smarter if the "Whole Drive" is selected

[Smurf-IV]

Not sure that this can be done reliably, because:

• Recycle Bin space should not be counted (All flavours)
• Network drives can be weird
• Files / directories can be "Locked out" e.g.
  • Bitlocker
  • Access rights
  • Hidden
  • etc.