Temp folders are generating and not getting delete in ILMT

On my BigFix server temp files are generating automatically without doing any patching activity. We are using ILMT.

C:\Program Files (x86)\BigFix Enterprise\BES Server\UploadManagerData\BufferDir\Temp

Files are not getting auto delete and downloading continuously which is occupying my disk space.

The temp files are uploads received from clients and will be processed by FillDB service. Is the FillDB process/service running?

Yes, FillDB service is running properly.

How many files do you see in the Temp folder?
Is this a single server install or is DSA setup?
Are there any errors in FillDB.log file under FillDB folder?

You may have to open a support case with ILMT team for further investigation