It is important to note that the hard drive volume configuration need to be the same on both computers .
By this we mean that if the source computer has a C:\ volume only, then it is important that the target computer also has a C:\ volume.
If the source computer has C:\ and D:\ volumes then it is important that the target computer is configured with C:\ and D:\ volumes.
What happens when drives are incorrectly configured? #
You may have a scenario where the source computer has a C:\ and D:\ volume but the target only has a C:\ volume.
In this scenario the data on the C:\ volume will be transferred as expected, but all files on the D:\ volume will be skipped because the destination volume does not exist.
How do you work around this problem? #
In a scenario where the source computer has a C:\ and D:\ volume, but the target computer only has a C:\ volume, then you will either need to configure the target computer with a C:\ and D:\ volume or you will have to run the migration to transfer the C:\ volume data and then manually copy the D:\ volume data from the source to the C:\ volume of the target computer.