I realised a folder of DVD files I’d downloaded was located in:
I should have originially saved this with my other childrens movies at:
Note the Z replacing the S.
So I used Transmissions “Set Data Location” option to move the folder.
When I browsed to the folder “Kidz” with Windows Explorer I noticed the folder “Kids” still existed but there was also a folder called “kidz”. 2 folders called kidz with different capitalisation. Because I edited the path from “Kids” to “Kidz” I am pretty sure that the lower case “kidz” folder has come from nowhere.
When I browsed the “Kidz” & “kidz” folders they had the same contents. The DVD was no longer in “Kids” but was not present in “Kidz” or “kidz” either.
I used Windows Explorer’s built-in Search functionality to find the DVD in one of the Kidz folders which it did.
But when I cancelled the search only that DVD remained in both Kidz folders. Hundreds of folders & files have vanished. I tried searching for them but there were no results. The filesize of the 2 Kidz folders is the size of just the DVD. I ran cmd.exe to check the contents of the 2 Kidz folders & they both only contain the DVD.
I’ve opened a support case.