Hi, nice to meet all of you guys here! I just got my HR21 but was surprised how fast the recordings fill up! I've searched around the forum, but I am wondering what the working Hard Drives would be for HR21-700? I've seen some setups for HR21-100 but I don't know if it's compatible with mine also. I am currently looking at Cavalry 1TB Dual Interface USB 2.0 & eSATA External Hard Drive - CAXE3701T0 Would this work?