Full HDD problem

Hi all!

Have a AMS5 and 6 live streams (HLS). After a 2-3 days I have get a message that HDD is full. When I check this I soo that "stream" folder (ams\application\livepkgr\_definst_\streams) up to 100Gb. It this folder I see my 6 stream subfolders. Is this cache files?

So I need to detele these files to continued work. What the promlem is? And what I need to do??