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My system updated just fine... all my software seems to be working other than iPhoto is not supported on Big Sur... however I do have a problem.... one of my attached discs are not readable.... they were yesterday before updating to Big Sur...
"The disk you attached was not readable by this computer"
Eject
Ignore
Initialize
are my choices... I have data on the drive that I would rather not lose.... What does "Initialize" do to the drive?
iMac 27″ 5K, macOS 11.0
I have this problem too and would like to know the answer. I have a microSD card that I use with my drone. It was readable before Big Sur. Afterwards my mac doesn't read it, and I don't want to lose my drone footage on the card.
Yes.... I tried an old iMac and it worked....
Thank you...
Glenn
Initialize means erase, so you don't want to go there. Any other Mac that you can access that data from?
This doesn't solve the issue. Why can't I read my USB drive from Big Sur? I don't have an older Mac to use.
Big Sur software update...
