When I checked Application logs in Event viewer, it shows me below error message.

18210

BackupMedium::ReportIoError: write failure on backup device 'M:\Database backup\Walker_vendorData\Walkers_vendorData_200408.bak'. Operating system error 112(There is not enough space on the disk.).

In System logs no error logged.

When I take differential backup of same database then it's working.Then why this is problem with a particular database full backup.?