I need to clone a disk. usually i've been doing this straightforward with dd. But in this case the disk i need to clone is an external USB-Disk that is 5TB large. So I'm guessing this will take somewhat between "way to long" and "an eternity".
Is there a cloning method that supports resuming (if something goes wrong, the PC crashes or I need to stop the process for some reason)?
The disk in question contains only one ext4 partition and is basically a data dump, so nothing complicated there.