Ubuntu 21.04 Hirsute Hanimal EoL 2022-01 when you stop getting updates.

Better to use LTS - long term support like 20.04LTS, unless you have very new hardware. Then latest version may work or even need newer kernel & drivers.
22.04 will then be out in April.

Post these, in code tags.
lsblk -e 7 -o name,fstype,size,fsused,label,partlabel,mountpoint
cat /etc/fstab
mount