bsprague wrote:
The short answer is that it takes about 30 seconds per 1 GB if the photographer has a USB 3.0 port on his/her computer. If it is a USB 2.0 port it will be about 2 minutes per GB. So seven minutes to twenty eight minutes, depending on equipment.
For Lightroom Classic, you would plug the USB Flash Drive into your computer and do an Import with Copy option. It would be perfectly reliable.