Insufficient disk space to install the newer hotfix. Rollback prior/old hotfixes to free up disk space, but this is going length process. There's no Hard Disk space to apply the newer hotfixes.
It is not possible to reclaim disk space by removing earlier hotfixes. Restarting the appliance does not resolve the issue.
Cannot apply newer Hotfixes due to Insufficient disk space on HDD. Rollback older hotfixes to free disk space but this may cause issues.
Please contact Sonicwall Technical Support to resolve the issue for the time being.
However, this issue will be resolved in an upcoming March hotfixes on versions 12.4.3+.Hotfixes