Been trying to copy files (Pictures and Videos) from my Mac to the WD My Book. Always encountering an error that is saying a file is in use but no other application is open and not using the files, at that point my Mac will stop recognizing the WD HD and I need to eject the HD. A similar error will pop up saying I need to force eject the HD as a file is in use. Upon force eject and removal of USB connection then reconnect, the cycle repeats itself.
I had partition the HD with Exfat format and GUID partition table. Am I doing it right?