My 722k HD DVR is dying.(hard drive clicking, freezes, and other issues). Dish is shipping a free replacement 722k next week. I have about 20 to 30 hours of HD programs recorded on the old 722k. Can I just copy all the recordings to the external hard drive now? When I connected it to the new 722k, I assume I'll be able to copy everything from the EHD on the new unit? Are there any dangers of losing any programs on the EHD? Thanks!