Reply to the problem
The disk cannot be copied as it has no drive letter, and marked as unallocated. Windows only allows format and make the drive active which then makes all data not recoverable. However the good news is I found the problem and the app is working good. I am half way though recovery with about 350 GB recovered. It will take another 24 hours to complete the task leaving I would guess 50 GB spare on the recovery drive. The mistake was me not looking at the settings enough. There is box with boxes to tick. This box has a thousand and one file types to recover preselected. On the present attempt I found this box and selected the ten file types I need. Windows seems to find pleasure in making multiple copies of file. Interestingly I have recovered the full maintenance records for a Puma SA330 auctioned in the Middle East, maintenance manual for that and others. These take up a lot of space. Detail. Here in Bali the weather is downright cold at 27C today which is handy as the drive being recovered is running at 40C internal temperature, well within its 60C limit. Overall an interesting problem to come across. The recovery app is recommended.