How can I get my new Mac book Pro to read my external hard drive?

I have recently upgraded to the new MacBook Pro and have a new 2T external hard drive. I used my old MacBook Pro to transfer all my files from my old 1T hard drive of the same make to the new one. This all worked without isssue and I can open the ne external hard drive on my old Mac but my new Mac is reading it. It does not show up in finder at all but it does show up in Disk Utility. Any suggestions? Do I need to do something on my new Mac for it to be read? The new Mac has no problem with the smaller USBs I use.

How do you have Finder Preferences set?
Ciao.

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