Basically Backupio, backupbuffer, Backupthread means that you have a slow backup media. Of course only if the waits are high on one or more of these wait types.
It might not be a problem, but you must be aware that a high wait can mean that you backup takes a long time to run. Long running backups may impact performs of your server.
What to do
I would recommend two things:
- Move backup to another and faster location (but that might cost you money)
- Implement backup compression if possible.
Again. If you are working in a company that only works from 08.00 to 18.00, and the wait occurs at night, because you take backup at night, then it might not be a problem.
But if you are taking backup during working- or servicehours, then you might consider solving these wait types.