Tvheadend

Hi, I'm using Tvh 4.2.5-18 to record some tv channels with no problem. I installed a new hdd in my pc to increase the storage capacity, but when I change the default "recording system path" into configuration-recording-recording file option, the recordings don't start and into the log I see "Not enough disk space" (but the drive have 4Tb of free space). I formatted the partition in ext4 and gave at the folder the full rw permission with command #chmod -R 777 /media/username/hdname/foldername
Where I wrong?
Thank for your help