Steps to reproduce:
Request key vfs.fs.get from Zabbix agent 1 and Zabbix agent 2 on Windows

Result:
Agent 1 reports lpFreeBytesAvailableToCaller parameter received from GetDiskFreeSpaceEx() as free bytes value.
Agent 2 reports lpTotalNumberOfFreeBytes parameter received from GetDiskFreeSpaceEx() as free bytes value.

In order to reproduce the issue, a system where these values are actually different is required.

Expected:
Both agents should report the same value as free bytes value. It should be decided which one.