SUMMARY When attempting to copy a directory that is larger than the remaining space on the device, Dolphin refuses the copy operation after examining the directory with the message "There is not enough space on the disk to write ..." While *technically* correct, this does not apply to filesystems that support reflinks, such as XFS in this case. STEPS TO REPRODUCE 1. Obtain a XFS filesystem. (May also apply to: bcachefs, btrfs, possibly ZFS and network file systems as well) 2. Create a directory (or file) to occupy more than half of the available space. 3. Attempt copy it within the same filesystem. OBSERVED RESULT Dolphin refuses to copy, shows message: "There is not enough space on the disk to write ..." EXPECTED RESULT Dolphin recognises that a reflink copy can be performed and continues to do so. Just like the `cp` command would. SOFTWARE/OS VERSIONS Operating System: Arch Linux KDE Plasma Version: 6.3.5 KDE Frameworks Version: 6.14.0 Qt Version: 6.9.0 Kernel Version: 6.14.6-arch1-1 (64-bit) Graphics Platform: Wayland Processors: 24 × AMD Ryzen 9 3900X 12-Core Processor Memory: 62.7 GiB of RAM Graphics Processor: AMD Radeon RX 7900 XT ADDITIONAL INFORMATION This *may* be actually a KIO issue, but I also tested Krusader and it does not seem to be affected. Therefore I'm filing this as a Dolphin bug.