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I've noticed that recently I'm often having trouble "safely ejecting" my 5TB external USB drives using the "Safely Remove.../Eject" icon from the taskbar after I make a Macrium reflect backup to it.
(This is on a Windows 10 1909 system 18363.900 using Macrium Reflect 7.2.4971.)
I usually notice an issue after making a Reflect backup to it when subsequently trying to safely eject it..I get a pop-up saying that it was in use and can't be safely removed. It won't eject no matter how many times I try. I make sure to close the Macrium reflect program first, but that doesn't make it work.
If I haven't backed up to it, it usually safely ejects.
I noticed that the 'Computer Management/Disk Management' program says this is 'Disk 5, basic, online'. I might be wrong, but I was expecting it to say 'removable'.
I have CBT installed, and the CBT tool shows it in the list as 'Local drive: ( I: )' when it's plugged in.
Are removable drives supposed to be listed as 'Local'? If not, could this be caused by Macrium?
I noticed that if the eject fails, the event viewer gets new entries claiming the removal was prevented by Process 4, as well as the Windows defender process. There are also several 'mrcbt' error and informational entries added..
That got me wondering if Windows 10 was misidentifying the drive as not being removable.