I wasn't speaking of making a backup of the external HDD. My point was, the external HDDs are probably more reliable than the ones crammed into DVRs. In post #35, the OP thinks he'll lose recordings on his EHD if his DVR dies,
"i didn't realize that i couldn't keep the recordings both on the internal hard drive and the external hard drive"
and then says this,
"...But, at least if I transfer some recordings to the EHD and keep others on the DVR, I'll effectively cut the chances of losing all my recordings in half."
The second comment is what I was referring to when I talked about how not to lose any recordings.
"i didn't realize that i couldn't keep the recordings both on the internal hard drive and the external hard drive"
and then says this,
"...But, at least if I transfer some recordings to the EHD and keep others on the DVR, I'll effectively cut the chances of losing all my recordings in half."
The second comment is what I was referring to when I talked about how not to lose any recordings.