Advertisements Over the weekend, I tried to upgrade my old Series 3 (the original one - not a TiVo HD), using WinMFS on a Win 7 machine to do a MFSCOPY from the original drive to a 1 TB one. The copy seemed to work as expected (including asking if I wanted to expand the drive - presumably MFSSUPERSIZE). But when I put the drive in the Tivo (taking the original out), it just reboots over and over again. Any ideas or suggestions what I can do to troubleshoot? Here are more details (in case they're relevant): I'm upgrading to a WD10EURX drive that's a new drive. I'd originally had a WD10EURX (or EURS - I don't recall now) in there, and in the last month that drive failed so I put the original back in, and had the vendor who sold me the original 1 TB drive send a replacement under warrantee. The original drive was doing the same as this one (with the TiVo rebooting constantly), and with the original drive works. I admit, I didn't do any other checking on the old drive to confirm that it really was defective, and I no longer have that drive to check. Also, when I first attempted this transfer (using WinMFS), I tried it on a Windows 10 pc here, and after a few hiccups, thought that it worked, only to have the TiVo rebooting issue I mentioned above. That was when I decided to dig a Win 7 machine out of mothballs and try that one, only to have the same ultimate result. Should I look for a way to "low level" format the drive first? Should I have not done the "expand" on the drive? One other thing - I'm also planning to upgrade my Roamio one of these days, so I probably should get over my hesitation to use MFSTools, and I could try using that to copy the data for the Series 3 too.