
The hard disk can also be written to with the Mac in 9 hours (Scenario 3). It is not due to the external hard drive or the additionally required adapter from USB-A to USB-C on the Mac. But it is possible to write to the same disk with the same cable and the same data under Windows significantly faster. The activity LED on the hard disk flashes continuously.ĮxFat may have its optimisations for SSDs. I format the external hard disk with the Mac and start the copying process. The activity LED on the hard disk flashes continuously. A significant part of the data is copied which makes the prediction of 9 to 10 hours seem realistic. The prognosis is 9 to 10 hours under Windows. The previous data is deleted (not reformatted).

The activity LED on the hard disk also shows very long pauses. Only a relatively small amount of data was copied, so the remaining 9 days would probably have been needed. 6 hours of running time, another 9 days are assumed. I try to copy the data from the NAS to the external hard drive. I have formatted the external drive with the Mac as exFat. A Western Digital Elements 5TB as external hard drive.

I think I can refute the previous answers and am therefore still looking for an answer or solution. I have read questions here about exFat and its performance on the Mac.
