SUMMARY When there is not much space left on the disk, KIO will not try to duplicate (Ctrl+D) files or directories that would take up more space than is left. On BTRFS, however, due to the deduplication, this operation will not take up any space at all. Therefore KIO falsely aborts a duplicate operation that should be possible. STEPS TO REPRODUCE 1. Fill up disk 2. Find a file that is bigger than the space left on disk 3. Try to duplicate it (Ctrl+D) OBSERVED RESULT Is not duplicated EXPECTED RESULT Should be duplicated SOFTWARE/OS VERSIONS Is not duplicated ADDITIONAL INFORMATION Operating System: openSUSE Tumbleweed 20221206 KDE Plasma Version: 5.26.4 KDE Frameworks Version: 5.100.0 Qt Version: 5.15.7 Kernel Version: 6.0.10-1-default (64-bit)