Minimizing Disk Writes

Make Journal Storage Volatile

[Journal]
Storage=volatile
RuntimeMaxUse=256M
Compress=yes
ForwardToSyslog=no

Mount options - noatime

UUID=xxxx  /  ext4  errors=remount-ro,noatime  0  1

Disable Coredump

[Coredump]
Storage=none

Disable services

sudo systemctl disable --now man-db.timer
sudo systemctl disable --now apt-daily.timer apt-daily-upgrade.timer

Watch What Writes to Disk

sudo iotop -o -a