fstrim

Discard unused blocks on a mounted filesystem. Only supported by flash memory devices such as SSDs and microSD cards. More information: https://manned.org/fstrim.

• Trim unused blocks on all mounted partitions that support it:

sudo fstrim --all

• Trim unused blocks on a specified partition:

sudo fstrim {{/}}

• Display statistics after trimming:

sudo fstrim --verbose {{/}}