Awhile ago, I found out one of my coworkers has a Tivo HD and was complaining about how flaky the eSATA connection was with his Expander. He talked about it being loose and how he'd sometimes receive the External Storage Missing message. Because of the above, he characterized TiVo as the most unreliable consumer device he's ever bought. Well, he's not active here on TC and didn't know about the recommended cables and supposedly crappy Expander stock ones. For me, on my Tivo HD, the stock cable WD supplied w/my 1 TB Expander isn't that loose and I've NEVER hit the External Storage Missing message. I bought the SIIG CB-SA0111-S1 (via http://www.walmart.com/ip/SIIG-eSATA-to-eSATA-cable-1m/10884515#ProductDetail, I believe) for good measure and used that, eventually. It seems to fit w/more friction and stay in better but it's not light years ahead, IMHO. I loaned him my stock WD cable and he said it was identical and just as loose. I loaned him my SIIG CB-SA0111-S1 and today he told me it fits much more securely. It seems like TiVo might've revved the connectors or perhaps they become looser over time? I believe his is older than mine. I got mine in Sept 09.