While copying files to a device which has insufficient space for the whole set of files being copied, only as many files are copied as will fit, and then the process ends without informing the user that all the files could not be copied due to insufficient space. This behaviour is wrong. The user may not be aware at all that all files were not copied. The system should inform the user of this condition. This may be related to the old bug #243160, but that bug is for a much older version of KIO, and the actual results in this case are different - the notification of copying finished that is shown is exactly the same as the one for a complete, successful copy operation, whereas the actual results for the old bug are that the user is notified of the failure. I have experienced this with KIO version 5.28.0 using Dolphin 16.04.3 on Plasma 5.8.5, but I could not find the KIO version on the list of versions available for this bug report.
(In reply to Saurav Sengupta from comment #0) > the notification of copying finished that is shown is exactly the same as the one for a complete, successful copy operation Can't reproduce in current git master. The notification says that copying failed, and there's also an error message in Dolphin window saying that disk is full. > I have experienced this with KIO version 5.28.0 using Dolphin 16.04.3 on Plasma 5.8.5, but I could not find the KIO version on the list of versions available for this bug report. That's because it's old KDE4-era KIO. The new one is frameworks-kio.
This report is more than a year old and the problem seems to be gone; perhaps this can be closed.