I decided to try BT CLOUD on my IPad (IOS 11.3.1) after a long break as it never seemed to work properly. It appears not much has changed. If I try to delete a single file BT Cloud crashes. If I select more than one file to delete it appears to not do anything and the app is unresponsive. I have to exit and reopen the app.
Also the thumbnail images take an age to display sometimes only showing when I select the file icon. I’m on infinity with 50mb speed so unlikely to be that.