This is a strange one!

I've just started using Onedrive on a couple of devices - PC, Linux and iPad to edit a couple of Excel files using Excel Online - the free Microsoft Office online app.

When I edit a file it leaves behind a '~locked file AND creates some (OLDER_ ... files - see

One of the files (the .ods file) has NEVER been edited in Onedrive (nor on my Linux box or iPad EVER nor on my PC recently - >12 months!).

When I clear out these junk files I have only a couple of files in my Root directory.

I've googled (OLDER_ with no success and also .~lock.

Any ideas??