Files in Mangement Point CCM\Incoming - Backlog

I see lot of files in SMS\CCM\Incoming folder and SMS\CCM\Incoming\Bit sessions\Requests\Anonymous-null with files names like ({F66497D5-04B2-4C20-B983-C0CEE67DC498} in SCCM Management Point. I see there are new files coming and getting deleted from here. But lot of them are still present.

Can someone help to identify what these files are and advise how to clear up these files.

(Moved this question from Configuration Manager General forum as no one had responded) 

Thanks

Sri