Instruction: Answer the given question by extracting information from the supporting document.

Input:
Question: 2 TB?? Has anyone found and/or used a 2TB model of this DVR expander? I want to buy an eSATA hard drive for my Directv DVR, and it seems silly to only buy 1 TB.
Document: Bought this expander in 1 TB for my Cablevision box. Had to return it. Did not find the product compatible; could not set it up with my box and Samsung LED 46" TV. The WD model seems to be very popular but there's nothing on the packaging that indicates it works with the Scientific Atlanta 8300HD. Then purchased (through Amazon)  an "Apricorn DVR Expander II 500GB Cable and Dish Network Dual eSATA / USB 2.0 - (ADVRE2-500). A technician at Cablevision recommended Apricorn.
I have been using the DVR Expander for over a month with a Scientific Atlanta 8300HD on Time Warner Cable. I found it easy to set up and use. I only wish I had gotten it sooner.Western Digital My Book AV DVR Expander 1 TB USB 2.0/eSATA External Hard Drive
This is what I told WD as I was simultaneously registering and requesting an RMA for my Western Digital My Book AV DVR Expander 1 TB USB 2.0/eSata External Hard Drive:"This is my 2nd WD external hard drive. The 500GB one I have registered on my account and now this 1TB model have both failed after about 6 months of use. I'm very leery of using WD but, hey, you know, this one is still under warranty.
I have a DirecTV HR20 DVR and was frustrated by the limited storage capacity now that the majority of what my family records is HD.I saw the info on the DirecTV web site that listed four "recommended" external drives to add storage, but warning that it is not officially supported. I read other customer reviews and liked the 1 TB Western Digital drive listed on the DirecTV site. However, I saw on Amazon that this newer model was available which also included USB in addition to eSATA.
Our cable company's DVR seems to have a pathetically small hard drive and I found that it was possible to expand it by using an eSATA drive like this one. Our typical usage level dropped from 30% to 3% :-)  Now I don't have to rush to erase recodings I don't want that are made automatically :-)
For the price of this unit, it should have at least 2 TB capacity - or the price should be lower. Unfortunately for DVR use, the eSATA interface seems to have gone out of favor; this unit is one of the few choices currently available.The only reason to buy this drive is the eSata port. It also has a USB 2.0 port, but you can buy 3-4 TB units with USB 3.0 for not much more than the price of this unit.
The WD My Book AV DVR Expander 1 TB USB 2.0/eSATA External Hard Drive provides instant space for saving HD programs. The drive installation directions are easy to follow and require no special electronic skills. The TV recognized the expander instantly in a simple plug-and-play fashion. There were no glitches whatsoever, and I use it every day.
How that happened is unclear. Second: When initially looking at the Western Digital My Book AV DVR Expander 1 TB USB 2.0/eSATA External Hard Drive on Amazon, it offers refurbished and smaller 500 GB (all you will ever need)unit at reduced cost. So great, I order it. When it came it turned out to be a USB connection not an eSata connection. Now I have to go through an Amazon partner to get a refund.
WD My Book AV DVR Expander 1 TB USB 2.0/eSATA External Hard Drive. I bought this April 9 2013 and so far so good. I use this to expand the recording memory on my TIVO series 3. It's so nice to have all that extra recording space so I can make most of my shows 'keep until I delete." That way I can just wait till the season is done and watch the episodes all at once.
I purchased the Western Digital My Book AV DVR Expander 1 TB USB 2.0/eSATA External Hard Drive at the recommendation of Verizon (my FIOS TV service provider) for the distinct purpose of expanding the cable box DVR storage capacity from its internal 500GBs to a total of 1.5TB. The hard drive was received in good condition, was easy to install (all necessary cables included), and appears to work as stated.
Answer: Yes!  You can use a 2 TB Hard Drive.  I was advised by tech support that 2 TB is the max at this time.Be aware that it will slow your receiver down.  No problems with quality or picture.  However, there is a double to triple time delay when I am searching through guide or changing channels on my Directv DVR HD Model 24, 500 GB, Internal Hard Drive.That is not a problem for me.  It is worth it for the extra space.  I record a lot of football games on the football ticket.  This way my wife's shows do not get deleted.