Currently, it seems only possible to re-name recordings from Cloud. When using the real-time API, this is really inconvenient. It's common to make concurrent recordings, e.g. EEG, EKG and Eye Tracking while participants perform some kind of task. I want all of those recording files to have the same subject ID and, ideally, I can enter that ID at the start of the experiment, prior to starting the recordings (usually one would enter the ID in PsychoPy or PsychToolBox). For single recording sessions, this is not a big deal. However, when recording several subjects back to back, it becomes a bit of a hassle and a potential error source.