Both discs have 95,3 MB of unallocated space in front and 96,3 MB unallocated at the end.
They also have several partitions and marked in Macrium Reflect as
1019,5 MB - ext primary
1020,4 MB - unformatted primary
509,3 MB - ext primary
1.82 TB - unformatted primary
Those marked unformatted...