I don't remember disconnecting it without ejecting it but I do think I got a message about needing to eject before disconnecting. So I clicked on "Show All Devices" and this showed me each device the volumes were on.
Kappy
Now you either have a copy of a data backup in hand, or have recovered your important files with iBoysoft Data Recovery for Mac.
It is reasonable because if your Mac can't even read your disk's file system, how can you mount and access this hard drive on your Mac? You can also see it … User profile for user: Simon Templar 42
But no matter which solution you are going to try, to avoid data loss, you are always advised to back up your files or recover your data from this unmountable drive first with iBoysoft Data Recovery for Mac.But if unfortunately, none of these solutions can make your hard drive work again, or your disk is not even detected or showing up in Disk Utility, then this drive might be physically damaged.
The reason is that when your external drive won't mount, you lose the only access to all your files on this drive. I believe you must disable it or set an enabled user before you can unlock the disk. It saves time and money for users. Sep 3, 2012 3:27 PM So, mounting is a necessary step before the operating system can access a disk (including read from and write to).
Select the unmountable WD external hard drive and click "Erase" on the top.
In this case, you can download a Still unable to mount the external hard drive on Mac? This factor may not be as possible as the other causes, but it does happen.Even though the reasons for a not mounting disk are different from case to case, certainly there are some things you can do to fix this issue. Locate your unmounted external hard drive, select it, and click "Scan" to scan for lost data. In response to Kappy
User profile for user: Sep 3, 2012 4:59 PM
See: Two scanning modes are allowed: With the preview feature, you can check whether your files on this unmountable disk are in a good condition or not.
Well, it is possible that you're unable to mount a drive just because it is corrupted and unrecognizable by macOS. But it says "This partition contains a locked disk and cannot be resized until it is unlocked" (355,729 points)
However, it is a different story if you need to access and write to NTFS file system on Mac.
What's more, this program can also recover lost data from formatted or corrupted Macintosh HD external hard drives, USB flash drives, SD cards, etc. Simon Templar 42 Alternatively, you can also select the disk and click on Mount to make it accessible by the operating system using Disk Utility. If your external hard drive is not mounted on the desktop or in the Finder, you can try to mount it manually in Disk Utility (a native disk management tool in your Mac).
"I was able to use my 3 TB external hard disk drive to backup my data last week. User profile for user: