Really sorry for the issue! Can you provide us the output of the following command:

df -h

This could possibly be the issue of the mount point of the Volume. We will need to resize2fs the partition of the Volume created.

Refer to below link, which provides you the insights on how to achieve this:

https://www.digitalocean.com/docs/volumes/how-to/increase-size/#resizing-a-partitioned-volume

Here is the output of df -h with the volume.

Filesystem                           Size  Used Avail Use% Mounted on
/dev/sda                             380M  370M     0 100% /mnt/volume_nyc1_01