Hello

Increase the volume size in your storage dashboard or using the API

[screenshot]

Check that the additional space is accounted for

ubuntu@mailgafr-sgp2 ~> sudo zpool list
NAME                SIZE  ALLOC   FREE  CKPOINT  EXPANDSZ   FRAG    CAP  DEDUP    HEALTH  ALTROOT
mailgafr-luks-zfs  14.5G  13.6G   885M        -        5G    50%    94%  1.00x    ONLINE  -

Note there is now 5G under EXPANDSZ.

Expand

ubuntu@mailgafr-sgp2 ~> sudo zpool online -e mailgafr-luks-zfs mailgafr-luks-zfs

Confirm

ubuntu@mailgafr-sgp2 ~> sudo zpool list
NAME                SIZE  ALLOC   FREE  CKPOINT  EXPANDSZ   FRAG    CAP  DEDUP    HEALTH  ALTROOT
mailgafr-luks-zfs  19.5G  13.6G  5.86G        -         -    37%    69%  1.00x    ONLINE  -