Version:           4.5 (using KDE 4.5.4) 
OS:                Linux

It could be really cool if, when copying/moving files, the system automatically detects if a file transfer is already running for selected device/partition/location and enqueues it instead of running them in parallel.

Maybe some users still wants their transfers  to run in parallel, so we can improve the "copy here"/"move here" dialog adding a dropdown list of active transfers for selected location named "enqueue to".

Or, maybe simplier, permit to drag&drop files to an active transfer dialog in the notification area to add selected files to the transfer.

Reproducible: Didn't try