Transmission

Update: Is this some sort of permissions issue? It looks like I cannot re-name any files or folders on the external disk, or copy, etc. This must be related and was not an issue at all until yesterday. Permissions in Get Info are set to allow me to Read & Write. What am I missing?

Did anyone find a fix? Mavericks here, used Transmission for years off of an external JBOD array. Yesterday switched my external box over to Thunderbolt; a number of movies which had been in the middle of downloading before the changeover subsequently downloaded, but it turns out their extensions ...