Thanks to you John :
I’am adding a cron.daily TRIM for DietPi v121. Won’t work for XU4 (yet), but other devices using flash memory should benefit from it:
This will trim all capable drives (via a list of all mount points):
#TRIM drives (all mount points)
df -P | awk '{print $6}' | tail -n +2 > /tmp/.dietpi-cron-daily_trim
echo -e "$(date)\nDietPi Cron Daily | Filesystem trim"
while read -r line
do
fstrim -v "$line" >> /var/log/dietpi_cron_daily_trim.log
done < /tmp/.dietpi-cron-daily_trim
rm /tmp/.dietpi-cron-daily_trim
cat /var/log/dietpi_cron_daily_trim.log