How dangerous is KDE Partition Manager for my data?
First of all, you should never perform any destructive operations (delete, move, resize) without first making a complete backup of everything affected. Having said that, KDE Partition Manager is safe to use. It performs extensive checks before and after every operation. It calls external tools written and supported by the file system authors. And it has been tested extensively. There is always the risk of data loss due to an unknown bug. KDE Partition Manager’s authors try to minimize this risk, but there are of course no guarantees.