I've been using an HP MediaSmart EX480/WHS (Windows Home Server) to extend the size of my Series 3's storage space for several years now with great success. Using the "HP MediaSmart Expander for TiVo" addin of the WHS console to auto-transfer episodes of a show as they air to the WHS, then transferring them back to the TiVo when I was ready to watch the entire season(s) has made managing my S3's limited space doable (as well as letting me record new shows on 'speculation' and then waiting to see if they get good reviews or if the network ends up Firefly'ing them). This method has worked really well for me for me for some time now... but the file transfers have suddenly stopped working, with the "File Transfer Status" tab showing all transfers with a red "X" and the red error message "Cannot contact TiVo DVR, please check that it is powered-on is connected to the network. If problems persist, please consult the documentation." in the info block when you select one of the failed transfers. Since just about every element making up this very useful system has been deprecated by it's maker (HP gave up on the MediaSmart line... Microsoft has taken the WHS OS in a different direction, and as for the TiVo corporation... <grrr>... don't get me started, since they still refuse to put sufficiently large hard drives in even their top-of-the-line models!), I'm kinda stuck trying to figure out the problem myself. The only changes in any portion of my setup prior to this problem was caused by having to go back to my old router for wired networking, while changing the 'new' router to only function for wireless networking. This change occurred a week or so before the transfers began failing, so I doubt it has anything to do with the failed transfers, but I can't think of any other potential root cause. Both WHS and S3 are hard-wired through the same gigabit switch. Other random points about my current setup: The "Files on TiVo DVRs" tab of the HP Expander addin is still being updated with new shows from my S3. The S3 hasn't shown any issues (any new ones at any rate <grin>). I am still able to use my S3 to transfer and play content that was previously transferred to the WHS. Things I've already tried, unsuccessfully to fix the problem: Rebooted both WHS and S3 multiple times, including after each of the following changes. Changed which network ports (and even which switch) the S3 and WHS are plugged into. Significantly reduced the amount of video currently stored on the WHS (thinking I might have run into a previously unknown limit). Uninstalled and reinstalled the HP MediaSmart Expander addin. Anyone have any suggestions for other things I should try, before I have to start taking more extreme measures (like trying to pick up one of those problematic drive extenders) to avoid running out of space?