I just purchased the ArmorATD 4GB Drive. I have a 2018 13” MacBook Pro with Catalina 10.15.1. I formatted the drive as APFS and created 5 volumes. All was going well until I unmounted the volumes, waited a minute and pulled the Type C connector to disconnect the drive. I then received the “macOS can’t repair the disk”
I have observed (by putting my hand on the drive and feeling the drive vibrate) that my ArmorATD 4GB Drive keeps spinning for quite a long at times after ejecting the drive, one time almost 8 minutes. It seems to be longer after doing a large copy to it.
I am usually used to just waiting for a drive to power down within about 30 seconds before I physically disconnect it.
There must be something I am missing in the disconnect procedure that it is taking so long to power down and that I have to pay attention to whether it is spinning or not before pulling the Type C.