Hello! I have a 215Gb fat32 partition on my external SSD, and a 100Gb unallocated space right next to it, and I’s like to extend it to 315Gb. So, on KDE partition manager, I right-click on the fat32 partition, select “resize/move”, and this is the windows that pops up:

as you can see, the textbox with the size is grayed out, so I can only move the partition, but not resize it. Why? the device is not mounted of course, and I can operate on other partitions without problems.

thanks in advance!