Hi,
Thanks for the advice DavidCo.
jv16, yes the program did ask me and it is my fault as I overlooked the name of directory that PT offered to delete. By the time I had stopped the 'wiping' I had lost quite a few pictures and small videos. I have recovered some but a lot are incomplete and will not open.
There is no blame with the program, it even asked me to backup; all user error which I have never done before :
Everything else is backed up and this was the only file needing backup which I was about to do next week having just bought a second laptop. I am currently living in Bulgaria and it is difficult to get backup devices for this size of file, approx 10Gb.
Anyway, it looks like PT did quite a good 'wiping' job which is beyond the capabilities of most recovery software.
Thanks
Celticprince