external, get an antec mx-1 enclosure with a hard drive like one of the Western Digital GP series or Seagate's in the size you would like.
The MX-1 is good as it has a fan to cool the drive, most externals are not meant to be run 24/7 and get too hot (DVRs put a load on the drive all the time).
The MX-1 is good as it has a fan to cool the drive, most externals are not meant to be run 24/7 and get too hot (DVRs put a load on the drive all the time).