I use DietPi in VirtualBox and just increased the Virtual Disk from 8GB to 16GB. Then I selected “dietpi-drive_manager” to increase the RootFS partition to the new maximum. Unfortunately is still is as small as before.
do you have a graphical desktop installed?
If so install gparted and resize that way, just tell it to expand the main partition to use the entirety of the new “virtual” partition…otherwise you will have to use command line
thanks for your help. I managed to fix it by exporting the “appliances” (VMs) to an .ova file. that forced the snapshots to be merged. then I re-imported them and deleted everything else that was not needed anymore. Now I could resize without a problem.