With this 500GB drive - an ERASE and Format operation (APFS Encrypted) - it must have sat there erasing for around 10-15 mins and then partitioning the drive for ~ 1 hr and then it finished the operation successfully (I've done the numerous times on prior MacOS versions and it all happens within 2-10 seconds or less with this very drive before and again after I did above). If you decide you want to ERASE and reformat the drive - that will take a LONG time. You'll face the same issue again if you reboot your machine (and most likely if it goes to sleep and wakes up again). If you leave your machine alone (not running any tests) for another 10-15 mins and run the test again you may see improvement and speeds of ~ 250-350 MB/sec. Running any speed test (Black Magic or AJA) with that disk as a target on Monterey you'll initially see speeds of approx 1-5 MB/sec. Accessing files via Finder is like slow motion animation as you click on a directory and it expands to show contents, etc. Eventually it'll mount (~ 5 - 10 mins) but once mounted will be slow. When you hook up this small drive (500gb) - encrypted APFS - it takes way too long to attempt to mount. On Monterey (M1 MacBook 14) its dog slow / almost inoperable.

The device takes FOREVER to get recognized by Monterey. I've a 500 GB Sandisk Extreme (v1) USB C. Posted this in another thread going to mention here as it's the same issue: Sadly I don't have the 16' MBP under BigSur with me anymore, so I cannot verify if this is a hardware compatibility issue or a Monterey bug I can delete volume, secure erase, partition, create volume, format.everything on Windows. I basically tried every method under the sun that one can google and I am sure the SSD is 100% working, I can read/write perfectly fine on both Windows and macOS

Tried to directly connect the SSD to the MBP ports/connect via Caldigit TS3 Plus dock / Connect via Elgato Thunderbolt 3 Pro Dock/connect via Belkin USB-C hub/ connect via Hyperdrive USB-C hub. Tried all the USB cables, all different portsĦ.

Tried to erase into all combinations of MacOS Journaled(case sensitive or not)/ExFAT/APFS(case sensitive or not)ĥ. Tried to erase into all combinations of GUID parition/MBR/Apple MAPĤ. Tried to erase in the Disk Utility GUI mode/Terminal command/Recovery mode Disk Utilityģ. erase the disk and erase the volume itselfĢ. Thanks for the advice chabig, I basically tried every combination possible.ġ.

Erase external disk mac