Product : Microsoft, HyperV/2019, DataCenter
Feature : Max Disk Size, Storage, Network and Storage
Content Owner:  Roman Macek
Summary
64TB (vhdx), 2TB (vhd), 256TB+ (raw)
Details
(no major updates with WS2019)

With Hyper-V / free Hyper-V Server 2012 / R2 the new .vhdx virtual disk format supports disk sizes up to 64 TB. Pass-through disks can be of over 256TB in size. The .vhd format is still limited to 2TB.