Most likely reason is no-one could help.
Don't forget, the vast majority of members are only on the forum to get their own problem sorted. There are literally only a couple of handful of members who take it to the next level and are interested in solving other peoples issues.
But let's see if I can at least get the ball rolling...
If others, like me, read where you say "restore them on the same hdd" they probably had a little freak-out moment.
Then you say "delete it again". Hopefully you haven't done that yet.
Rule #1 when trying to recover files from any device - use that device as little as possible.
If the device is sound, read all you want, but don't write to it.
If the drive is failing, read as little as is needed to recover your data.
More info would be helpful too Bob, like, how was the drive formatted; FAT, NTFS, exFat, other?
How is it connected; USB, cat5 etc?
What sort of external box is it in; NAS, RAID, plain USB?
What is your Windows version?
Brief history up to your current point. Like what have you done so far? What sort of drive format have you done to the drive?
What sort of files are trying to be recovered?