I suggest you follow the below steps to copy files from the external drive to the computer and check if it helps.
1. Open File Explorer, in the search bar type file explorer
2. Connect the external hard drive to the computer.
3. Click on This PC on the left side of the File Explorer.
4. Under devices and drives, Double click on external hard drive icon.
5. Press Ctrl Key + A Key or individually select the data files you want and press Ctrl + C Key to copy it.
6. Then press Ctrl Key + V Key to paste it in the computer.