Lubuntu 20.04LTS here, and I have Lubuntu installed on a 16GB flash drive.The space used in the root partition has jumped from 4 GB after clean install to 5, then to 6 and now to 9GB.
I have a 13GB root partition, and the rest are swap and boot-related.
It isn't that I haven't installed anything, but all I've done is - Install the KDE theme, while removing the other themes, installed the Nvidia driver, install Gparted, and add bcmwl drivers, and thats about it.
I'm asking experienced and intermediate users if with my type of things installed, (Nvidia drivers wont exceed 1GB , maybe 2 ?) it is reasonable to expect the OS size to balloon up by 4GB in 3 days of installation, or if there's something to look out for.
Why is Lubuntu growing like Windows after an update ?
gparted
(a GTK3 app) so it'll cause more libraries to be installed compared to the default KDE Partition Manager, so the increase in size is not unusual (consider software choices in your selection if it matters, Lubuntu is a Qt5 based desktop environment so GTK3 apps will require more to be installed..) – guiverc Jun 28 '20 at 01:30