Seagate backup plus hub 14TB disk does not eject properly from MacBook Pro

The most common reason is physical disconnection. It could be a poor cable connection or a bad cable. How is it connected? Direct cable? Maybe an adapter in between? USB-C to USB-A hub?

I don't have one of those, but I previously used a standard micro-B drive to USB-A cable and a USB-A to USB-C adapter, but it it would tend to disconnect a lot. I bought a micro-B drive to USB-C (3.1) cable to connect to a drive with a micro-B drive port, and it was more reliable. Something like this:

https://www.amazon.com/AmazonBasics-Type-C-Micro-B-Gen2-Cable/dp/B01GGKYIHS/

kimo69nyc Said:

"thanks, mount is greyed out....not an option...and there is no unmount option...thoughts ?"

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Verify your Drive: Repair your Disk in Disk Utility - Apple Support

kimo69nyc Said:

"seagate backup plus hub 14 tb disk not ejected properly happening constantly...thoughts to resolve it ?"

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Unmounting a Drive:

Unmount in Recovery Mode:

Boot into Recovery Mode (Intel or Silicon) . Then, using Disk Utility, see if the Hard Drive is seen. If it is, then see if you need to click the “Unmount’ button for it. Try rebooting once more. If of no success, then click mount button, and then the ummount button. Try rebooting once more.