Mac partitions

Received new 4TB My Book today. Part number WDBBGB0040HBK-NA
Erased to HFS+journaled.
Tried to partition.
It refuses to allow a first partition of 80GB,
Seems that there is 1.1GB of something hidden away on the device.
Has any Mac user successfully partitioned one of these things?
We have several older WD externals happily running with about 15 partitions (different OS versions, etc).
Anybody?

Hi n6ac,

Please refer to the link mentioned below:

https://support-en.wd.com/app/answers/detail/a_id/20270

Thanks, but that is nothing like what I encounter.
Disk Utility (on Mojave, High Sierra, and Snow Leopard) are unable to make the first partition anything greater than 20GB (it seems to have some hidden files, stuff I do not need or want).
Second and third partitions only set to 40 GB even though I am setting all for 80GB.

… n6ac

Are you able to view those hidden files? Also in my opinion, 5 TB size is too big for the Disk Utility. I would recommend you try a third-party disk manager that supports larger capacity drives.

Thanks for the bump.
No, the reserved item was inaccessible against multiple efforts.
Oops, typo, it was a 4TB drive.
Found in some WD pages that they discourage partitioning at all !!!
Sent it back.
Am reconfiguring my 2014 and 2017 3TB WD “MyBook for Mac” drives, which accommodate the Mac partitioning just fine.