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spin down

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    External USB disk does not spin down as expected

    I have two Western Digital Passport 3 TB drives. For a couple years I used both as TimeMachine backups and made them bootable recovery disks. They were both connected to my iMac, late 2015, macOS 10.15.4 and now 10.15.5 via USB j5Create USB 4-port adapter. As far as I can tell they worked...
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