Most services are moving to the cloud nowadays. Also complex graphical applications are now becoming available on the web. Disk space in the cloud might become cheaper than local disk space.
If jD would be able to run in the cloud, then wouldn't it be useful to have the possibility to transload files to one's own cloud drive, i.e., without downloading it to a local device?
The customer can then choose whether (s)he synchronises the files locally or not. Unless the cloud drive service also supports extraction of files, this would only work for plain files like .mp3 and mp4.