% Free sd card space drops with 4.2.1 upgrade

[WU0V]

Prior to upgrading this morning to 4.2.1, my 64 GB sd card would always show on the Nextion as having around 97% free space. It shows 33% free after the upgrade. The CPU temp is also in the amber range on the dashboard, whereas it ran cooler under 4.1.8 and earlier installs. Is this to be expected due to the upgrade of the Pi OS?. Just wondering if there’s some activity going on that eats up free space (in which case I need advice on how to undo that), or whether the Nextion is showing incorrect data.

[AC4WT]

I'm running 4.2.1 on an 8GB microSD card. Seems your install has not expanded on 1st boot to take up the space on the card.