Hi… Don’t panic. This is just a quirk of the dashboard, …
It will display the real size once you’ve connected a real, running machine (≥ once).
$ fly m run debian:bookworm --volume vol_abcd909:/mnt \
--shell --region syd --vm-size shared-cpu-1x
# cd /mnt
# df -h . # different way of determining size.
# find # recursively list all files.
# exit
Arguably “0 MB” is an alarming way of saying “don’t know yet”, but…
Hope this helps!