Data is overwritten for several reasons.
Shades of meaning:
#1 The device or drive is in working order.
#2 User may collect partial or less than 100 percent data
#3 Data Recovery Percentage or result will be known only after job or work is done.
Rule after the data has been overwritten.
#1 STOP working on a device or on a drive.
#2 Isolate and hold the drive or drive separately for data recovery.
Why is this rule?
Really want Overwritten data – STOP further damage so that whatever is left (and not overwritten) can still be retrieved. SO DO FOLLOW RULES #1 and #2.

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