[eth0ws]

Note of caution to the hoarders: I had a copy of flashpoint 11 on one of my drives and recently tried to move it to another disk... after two days of robocopy doing it's thing less than half of the files had been moved.

Obviously 1.4TB is enormous so long copy operations should be expected, but the sheer number of files makes it hilariously difficult to manage if you ever want to move it after extraction.

[Aardwolf]

Perhaps you can put it an uncompressed zip file and mount it as a file system (or other similar solutions such as a block device file)

[omnibrain]

Because he speaks of robocopy I assume Windows, so I would use VHDX, the virtual disks for Hyper-V. Windows is able to mount them as a drive.