Hi Tony,
Ah that’s very interesting and is actually what may have happened. The folder was definitely part way through uploading when the action was taken. It is possible that the person carrying out the action did something along these lines.
I believe they have emptied the recycle bin, so probably not anything of use in there to see.
Apologies for not being more insightful but due to the limited access to the server and knowledge of the exact sequences of events, it makes it a bit tricky.
At this point in time, it seems to be stable. We are going to start again and attempt the upload again. Thanks very much for your assistance.