Please sort out these problems.

I know this thread is old but I'm having the exact same problem and cannot find a fix, my external hdd continuously powers up and down for hours on end when the Xbox is in instant on mode.

The only way to stop it is to use power save mode or unplug the hdd. Neither option is acceptable really.

Has anyone found a fix yet? I'm using a Seagate 4tb expansion drive.

Micrsoft knows this issue and they are working on a fix.

You`ve done exactly this: (Settings -> Power -> "When Xbox is off, turn off storage") ?

Try a Hard Reset (~15sec Holding PowerButton) maybe that can fix it, but I don`t think so.

I would recomend to untick if it makes less On/OFF.

Yer that is ticked I think i have pointed it down to when the xbox is checking for updates for games. So it must spin up check update for one game spin down then spin up check a different game and so on son till it stops check. So hopefully Microsoft find
out and just can keep the HDD spinning till it has checked all games for updates because it cant be good for the drive to keep spinning up and down. Dose anyone no a way to tell Microsoft about this issue? Thanks

Have you got the latest dashboard update installed? I'm not sure if it's been rolled out to everyone yet. There's an option in the settings to turn your external hard drive off when the console is turned off, so you could give that a try.

Hey there Excellcium!

Please go ahead and create a new thread if you haven't already. This way you can receive support specifically tailored to you. Be sure to include the details of the issue as well as any troubleshooting steps that you have tried. Thanks in advance!