I am having the same problem.
There is some problem reading and writing the EPG data to the drive.
Got to be to do with the way the drive works... very low power consumption and has slightly different firmware to normal 7200rpm drives.
I'm afraid the drives are useless for anything other than backups.
My EPG takes 3-4 days to load... during that time, all recordings and playbacks are stuttery as well. Random stutters will be hardcoded into the recordings, which when added to the stutters on playback, creates a double-whammy !!!
Plus, the EPG is very slow indeed. It works fine for an hour or two, but randomly seeks for updates etc. to the EPG, and starts to slow down and stutter again. Drives me mad... mad I say !
This useless disk is is going to buried in the local woods with a backup of all my archived software, music and adult entertainment media !!! (Completely encrypted and wiped of prints of course
Bring back my old trusty Samsung F3 750, until I can afford another - 1TB version this time.
"...Caviar... naviar... crappyiar ! "