If it’s not formatted in APFS, then you have almost certainly identified your issue. Boy, did I feel silly finding this out.
What format did the drive use? HFS+?
I honestly promptly forgot, but it looks like they come as ExFat. It’s a 4tb Sandisk Extreme Pro ssd.
ExFAT does make sense, since it’s the only filesystem which supports read and write on all major OS. Sadly it’s also pretty basic, and thus not the first choice on any OS - except for USB sticks.
I generally recommend formatting any new storage media before using it. Just to make sure it’s properly formatted to work with my machine, and the manufacturer didn’t mess up their implementation for some reason.
Is there a better filesystem that is Mac and PC compatible? I’ve used ExFAT for that reason alone, but it’s a big one.
Not natively, as far as I know. NTFS works well on Linux for the most part (unless you need permissions), but macOS natively only supports reading.
FAT32 is universally well supported, but the partition size limit and 4GB file size limit make it unusable for me.
Linux filesystems as well as macOS filesystems aren’t supported natively anywhere else, so ExFAT it is.
