HDD is internal HDD and a replacement drive.
OK using FTP software working from a Mac but do have a PC on our network I can use, if my son lets me on ;-)
There is not sufficient information(that I can see) in the crash log to provide a quick resolution, so this is to try and get you back up and recording etc.... its a bit mechanical but should get you there!
1. using a telnet session (e.g. putty) login with userid root and your password.
type in init 4 (space between) to stop the receiver.
2. using filezilla or similar, logon to the receiver (root & password) using the receivers IP address.
copy the files from /media/hdd/movie to your PC (ignore the trash can)
in filezilla right click /media/hdd/movie & rename to /media/hdd/oldmovie
3. in the putty telnet session, type in init 6 (space between) to reboot the receiver.
on restart you should find an empty movie folder (apart from trash directory)
Then when you have time, slowly copy the recordings back, checking to see if there are issues as before.