I just installed macOS 10.13 beta 1 on my MacBook AIr. While USB devices are being recognized, my main external Toshiba HDD does not get mounted or show up on Disk Utility. Running a terminal command says that there is no external drive. The drive is formatted to HFS+ and I suspect the APFS on the system is not compatible. Technically, it should be as pointed out here:
HDD not recognized after APFS
I don't imagine an issue with software for APFS – the volume does not use that file system.
What's seen in the System Information view of USB?
I had a similar thing happen: I had to update from Mojave to Catalina because the former no longer supported Google Drive. In order to do so I had to reformat my SSD to APFS from MacOS extended (Journaled). Before I reformatted/upgraded I was doing one last backup with Time Machine when, in the middle of the backup, I accidentally knocked my HDD out, knocking it off my dresser and onto the (carpeted) floor. At that point I decided screw it (I had just done a backup a few days before) and went ahead with the upgrade. After I upgraded I tried to use Migration Assistant to restore all my files and settings from my external HDD – which I believe is MacOS Extended (Journaled) – but the computer wouldn't recognize the drive. I tried all the usual suspects (opening in safe mode, recovery mode, updating my computer, resetting NVRAM & PRAM, running diagnostics, force mounting in terminal) nothing would make it show up, in Disk Utility or elsewhere. I tried multiple USB ports and even tried other computers to no avail. The drive powers on when I plug it in but it doesn't feel like it's spinning. The only place I can find even a trace of the computer recognizing the drive is if I go to System Information > USB
Here's what it shows:
BUP Slim:
Product ID: 0xac1c Vendor ID: 0x0bc2 (Seagate LLC) Version: 1.00 Serial Number: 00000000NABDXC3M Speed: Up to 5 Gb/s Manufacturer: Seagate Location ID: 0x14400000 / 27 Current Available (mA): 900 Current Required (mA): 144 Extra Operating Current (mA): 0
I'm hoping against hope that there's some way of fixing this without losing all my data. I was ready to bring it in to a data recovery place but figured I'd ask here before I end up spending hundreds of dollars.
And in case you're wondering, I've already bought an external SSD and plan to buy another one if this drive isn't salvagable so I can always have two backups and never have this happen again.